#### Princezz3286

##### Junior Member

- Joined
- Nov 12, 2005

- Messages
- 66

1: Factor Completely: 16s^4 - 81t^4

I broke down into....

(4s^2 - 9t^2)(4s^2 + 9t^2)

I broke that down into.....

(2s - 3t)(2s + 3t) and (2s + 3t)(2s + 3t)

is that correct????

Another question I had a question on was

2: Solve 144m^2 = 25

I took the square root of both.....

12m = 5

and divided by 12 to get the variable alone.....

m= 5/12 did i do this correctly?

3: 4q(q - 5) + 14 = 11(2 + q)

4q^2 - 20q + 14 = 22 + 11q

- 11q -22

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4q^2 - 31q - 8 = 0

(4q + 1) = 0

(q - 8) = 0

q= {-1/4 and 8} right?