Question

Complete the square to re-write the trinomial below in vertex form:
x^2+2x+1

Answer 1

ax²+bx+c
when a=1, then take 1/2 of b and square it and add something


x²+2x+1
2/2=1, 1²=1
x²+2x+1-1+1
(x+1)²-1+1
(x+1)²