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I understand 4-6

**Thompsonnn**- Replies: 6

questions removed by administrator see post 4.

a would be 4 and b would be 16

a would be 4x^6 and b would be 16x^2?

**Thompsonnn**- Replies: 1

Factor 4x6 – 16x2 using the difference of squares method. Be sure to factor completely and show your work. If this is not possible for some reason, state why.

**Thompsonnn**- Replies: 5

Simplify (5x4 – 3x2 + 7x – 10) – (2x4 – 3x3 + 6x – 17)

Factor x2 + 9 using any method you choose. Show your work. If this is not possible for some reason, state why

do i do number 20 the same?

yes it does thank you!

t+8 t-3

should i distribute the t?

t^2-11t-24

t^2-8t+3t-24=0?

5t^2-24=0

im not to sure how

im not sure how to do the last 2.

-4.9t2 + 24.5t + 117.6 = 0 this is what i got for 18.

The one i have trouble on is 18-20

12.Work backwards to write a quadratic equation that will have solutions of x = -1/2 and x =4.

(x+.5)(x-4)=0

2x2-7x-4 =0

x-12=0, x-2=0

(x-12)(x-2)=0

x2-2x-14+24 =0

This is for number 11.

x-3=0, x+7=0

(x-3)(x+7)=0

(x-3)(x+7)=x2+4x-21

This is one of my attempts for number 10.

**Thompsonnn**- Replies: 30

10. Work backwards to write a quadratic equation that will have solutions of x = 3 and x = -7.

11. Work backwards to write a quadratic equation that will have solutions of x = 12 and x = 2.

12. Work backwards to write a quadratic equation that will have solutions of x = -1/2 and x = 4. (Your equation must only have integer coefficients, meaning no fractions or decimals.)

18. A tennis ball is launched straight upward with an initial velocity of 24.5 m/s from the edge of a cliff that is 117.6 meters above the ground. Which quadratic equation could be used to correctly determine when the ball will hit the ground:

4.9t2 + 24.5t + 117.6 = 0

-4.9t2 - 24.5t + 117.6 = 0

-4.9t2 + 24.5t - 117.6 = 0

4.9t2 + 24.5t - 117.6 = 0

-4.9t2 + 24.5t + 117.6 = 0

19. Solve the equation you chose in question 18 to determine when the ball will hit the ground. (HINT: If you don't get one of the answers listed for this question, then maybe you chose the wrong equation in #18. Use this opportunity to double check your work!)

t = 8 seconds

t = 4 seconds

t = 3 seconds

t = -3 seconds

The ball will never reach the ground.

20. Using the same equation, determine when the ball is at a height of 49 meters.

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