Question

What value in place of the question mark makes the polynomial below a perfect square trinomial?

x^2 + 24x + ?

A. 24

B. 48

C. 144

D. 12

Answer 1

144

Explanation:

`x^2+24x +144\\\\=x^2 + 2\cdot 12x +12^2\\\\=(x+12)^2`