Respuesta :

PhyCS
Number 1:

9x^2 + 12x + 4 -> (3x  + 2)^2
16x^2 + 24x + 9 -> (4x + 3)^2


2. x^2 + Bx + 64
B = (sqrt64) *2 = 16

3.
Solving equations like this requires completing the square, which has the first step of choice 4.