Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**4littlepiggiesmom****Member**- Registered: 2006-01-09
- Posts: 42

1. sqrt 7 8 sqrt 18/sqrt 2= I got 3sqrt 7

2. sqrt 10 8 sqrt16/sqrt5 = I got 4sqrt2

And the last one38sqrt 8/64= I got 3sqrt3/4

Offline

**mikau****Member**- Registered: 2005-08-22
- Posts: 1,504

First. In 1. Do you mean sqrt(7) 8 sqrt(18)/sqrt(2) ??? In this case, I got sqrt(7) * 8*3 or 24 sqrt(7). I think you forgot the 8 coefficient in front of the radical.

Just remember these are the rules. sqrt(m) * sqrt (n) = sqrt (mn). Also sqrt (5/3) = sqrt (5)/ sqrt(3) also you can always multiply the numerator and denominator of a fraction by the same quanity without changing the value.

A logarithm is just a misspelled algorithm.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,902

(1) √ 7*8*√ 18/√ 2 = 24*√ 7

(2) √ 10*8*√16/√5= 32*√2

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**4littlepiggiesmom****Member**- Registered: 2006-01-09
- Posts: 42

No my 8 should be * for the multiplication sign??? It's been a long night of checking over homework with lots of english to go??? Sorry

1 should be the square root of 7 times(*) the square rot of 18 over the square root of 2?

2. the square root of 10 times(*) the square root of 16 all over(divided by) the square root of 5

Sorry for the mix up

Offline

**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

So you are right mom on 1 and 2 because they got exactly 8 times your answers!

But your 3rd last one: 38sqrt 8/64= You said you got 3sqrt3/4, please explain youself.

*Last edited by John E. Franklin (2006-02-22 07:11:23)*

**igloo** **myrtilles** **fourmis**

Offline