Question

does (x+4)² = x²+16?

Answer 1

Answer:

(x + 4)^2 = x^2 + 16

it is equal

(x + 4)^2 = x^2 + 4^2

= x^2 + 16

Answer 2

(x+4)^2 is in the form of (a+b)^2.

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

(x+4)^2=x^2 + (4)^2 + 2(4)(x)

=x^2 +16 + 8x