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I understand 4-6
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?
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.
Simplify (5x4 – 3x2 + 7x – 10) – (2x4 – 3x3 + 6x – 17)
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.
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.
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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