Question

the question is x 2 + 2 X + 1 and X value is -1 but in the book the answer is written its zero so how can come the zero so please give me the answer.

Answer 1

x^2+2x+1

=-1^2+2×-1+1

=1-2+1

=2-2

=0

Answer 2

-1×2+2×-1+1= -3+-3+1= =0 sorry i am not answer this question.