Question

Using the completing-the-square method, rewrite f(x) = x^2 + 10x + 7 in vertex form.
Answers provided
f(x) = (x + 5)^2 − 18
f(x) = (x + 10)^2 + 25
f(x) = (x + 5)^2 + 7
f(x) = (x + 5)^2

Answer 1

$f(x) = x^2 + 10x + 7 \\\\ f(x)=x^2+10x+25-18\\\\ f(x)=(x+5)^2-18$