Which of the following quadratic expressions is factorable over the integers? Select all that apply.
A. x^2−6x+36
B. 16x^2+36x+81
C. 4x^2−49
D. x^2−10x+25
E. 4x^2+12x+9
A. x^2−6x+36 is factorable over the integers as (x-3)(x-3) or (x-6)(x-6).
D. x^2−10x+25 is factorable over the integers as (x-5)(x-5) or (x-5)^2.
E. 4x^2+12x+9 is factorable over the integers as (2x+3)(2x+3) or (2x+3)^2.
what about b and c
B. 16x^2+36x+81 is factorable over the integers as (4x+9)(4x+9) or (4x+9)^2.
C. 4x^2−49 = (2x+7)(2x-7) is factorable over the integers.
So, all expressions A, B, C, D, and E are factorable over the integers.