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#2 Re: Maths Teaching Resources » Basic Algebra for Form1 students in secondary schl » 2012-10-16 00:18:49

A number of books say we can use the substitution y=(m+1/m) to solve quartic equations that are symmetric i.e equations of the form ax^4 +bx^3+cx^2+bx+a=0, but do not talk much on quartic equations that are not symmetrical and are not easily factorised. The question is, are there other general methods of solving non-factorisable polynomial equations of degree greater than 3?

#3 Re: Maths Teaching Resources » Basic Algebra for Form1 students in secondary schl » 2012-10-16 00:11:54

Thanks for all the assistance you give students and teachers of Mathematics in this forum. We greatly appreciate that
big_smile

#6 Help Me ! » Problems leading to Simultaneous equations » 2007-11-15 05:50:30

austin81
Replies: 1

I have a problem bringing out the equations here

It t akes a student 12minutes to et to the  class from the sporting groung if she waks at 1.5m/s and runs at 3m/s. Had she walked half as far, she should have taken 8minutes. Find the di stance between the school  and the classroom.
Pls can i have some help?Thanks in advance

#7 Help Me ! » Help on website » 2007-02-09 23:37:14

austin81
Replies: 1

Pls can anyone help indicate a site that has multiple choice questions(mcq) for secondary and high school Maths?I' ll be grateful

#8 Re: Maths Is Fun - Suggestions and Comments » Wise sayings » 2006-06-20 04:40:33

He who expects the unexpected is unexpecting the expecteddizzy

#9 Re: Maths Is Fun - Suggestions and Comments » Wise sayings » 2006-06-20 04:27:42

The frowning of a goat can not stop it  from being sold

#10 Re: Maths Is Fun - Suggestions and Comments » Wise sayings » 2006-05-03 22:48:32

Pls can we keep this section moving by sending more wise sayings?

#11 Re: Maths Is Fun - Suggestions and Comments » Wise sayings » 2006-05-03 22:43:07

A wise mokey is a monkey that does not monkey wit another monkey's monkey

#12 Maths Is Fun - Suggestions and Comments » Wise sayings » 2006-03-06 04:52:24

austin81
Replies: 28

I'll like we have a section for wise asayings, be them Mathematical or others.
Ex "A man is not rewarded for having a brain, but for using it".up

#13 Re: Help Me ! » unit normal vector » 2005-12-23 02:49:59

I'm not very sure of that.

#14 Re: Help Me ! » unit normal vector » 2005-12-23 02:48:15

In my opinion I do think (x,y,z) = [z - g(x,y)]/3 is coorect.Since we shall be integrating

#15 Re: Help Me ! » Finding an inverse function » 2005-12-23 02:14:03

S(x+L) is S*(x+L) and not a function, right?  Using y as f(x) (as it's easier):

y = S(x+L)/x²
yx² = Sx + SL
yx² - Sx - SL = 0

Using quadratic equation:

x = (S ± √(S² - 4ySL) ) / 2y, y sholud not be 0.
That is ok now, i think

#16 Re: Help Me ! » What does this notation mean? » 2005-12-23 01:47:04

Are you treating complex numbers? If yes, then Z represents a complex number of the form  z= x+yi.
And z/6z=x+yi/6(x+yi).
Rationalise:x+yi(x-yi)/6(x+yi)(x-yi)
                = (x^2+y^2)/6(x^2+y^2)
                 =1/6
NB!!! This is if you saw this under complex numbers.

#17 Help Me ! » Solving a Cubic equation » 2005-12-05 03:37:01

austin81
Replies: 9

Pls help me solve for x in 4x^3-3x=1/2. leave answers to 4decimal places. Thanks in Advance

#18 Re: Help Me ! » Linear Programming » 2005-11-26 02:59:27

Thanks ery much> I just discovered there's more in Linear Programming than I thought of.

#19 Help Me ! » Linear Programming » 2005-11-19 06:16:11

austin81
Replies: 9

Please LI'll like to know the meaninings of these terms as applied in Linear Programming:
Objective function, Contraints, feasible solution, feasible  region, optimal solution, raetest and Least values.
Thanks

#20 Re: Help Me ! » equations » 2005-11-19 05:40:53

Two lines are perpendicular if the product of their gradients equals -1
Write each equation in the form y=mx+c:
where m is the gradient.
px+4y-2=0
y=-(p/4)x+1/2......., m1=-p/4
2x-y+p=0
y=2x+p.........., m2=2
m1*m2=-1...., (-p/4)*2=-1....p=2

#21 Help Me ! » Prob on Polynomials » 2005-11-17 02:13:02

austin81
Replies: 7

When a polynomial is divided by x-3, the remainder is 3 and when it is divided by x+2, the remainder is 13. Find the remainder when it is divided by(x-3)(x+2)> Hence write out the polynomial.

#22 Re: Help Me ! » more trig help please! » 2005-11-05 02:52:16

I'll continue from
where the inv of tan:
sin,cos and tan are +ve at 1st quandrant(angle=@°),sin +ve at 2nd(angle=180°-@),tan+ve at 3rd(angle=180°+@°) and cos+ve at 4th(angle=360°-@°).
Invtan(-1/2)=26.6° and Intan(-3°)=71.6°
Therefore required angles are
(180°-26.6)°, (360-26.6)°,(180-71.6)°and(360-71.6)°
Sorry I don't haveagood programthat illustrate Maths symbols.

#24 Re: Puzzles and Games » logic puzle » 2005-10-12 01:41:44

Is there any site that has explicit notes on Combinations and Permutations? I'll like  to be versed with that Topic.

#25 Maths Teaching Resources » Basic Algebra for Form1 students in secondary schl » 2005-10-12 01:31:32

austin81
Replies: 16

How can Basic  Algebra be  introduced successful to year one students in secondary schools?
Can one start with
3bannanas+4bannanas=7bannanas
3pears+4pears=7pears
In general,3a+4a=7a?

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