Question

Can someone help me with this? No links please

Answer 1

Answer:

3) $(4x-9)(4x+9)$

Step-by-step explanation:

Answer 2

Answer:

(3) (4x - 9)(4x + 9)

Step-by-step explanation:

4x times 4x will give you 16x^2, and 9 times 9 is 81, but you need to have one of the nines negative to give you the -81.

You needed the square root of 16 and the square root of x^2, then the square root of 81.