Question

Which expression is equal to (x + 3)2?

A. x2 + 6
B. 2 +9
C. x2 + 6x + 9
D. 12 + 3x + 9

Answer 1

A

Explanation:

(x)×2= 2x

(3)×2=6

x2 + 6....

Answer 2

C. x^2 + 6x + 9

Explanation:

(x+3)^2

using formula (a+b)^2= a^2 + 2ab + b^2,

(x)^2 + 2(x)(3) +(3)^2

=> x^2 + 6x + 9