Question

Is `36b^2 − 24b + 8` a perfect square trinomial and how do you factor it?

Answer 1

y = 4(9b^2 - 6b + 2).

The trinomial in parentheses can't be factored, since its D is negative.
D = b^2 - 4ac = 36 - 72 = - 36 < 0.