Question

What is the factored form of 4z2 – 24z + 36?
(2z + 6)2

(2z – 6)2

(2z + 6)(2z – 6)

4(z + 6)(z – 6)

Answer 1

4z^2 is a perfect square and 36 is a perfect square

so

(a - b)^2 = a^2 - 2ab + b^2

that should help you find a and b