Question

Which of the following is equivalent to (x + 1)^2 ?

x2 + 2x + 1
x2 + 1x + 1
x2 + 1
x2 + 1x

Answer 1

x^2 +2x +1

Explanation:

(x+1)^2

=(x+1)(x+1)

= x×x+x×1+1×x+1×1

=x^2+x+x+1

=x^2+2x+1