Question

Which equation below is equivalent to

x2+2x=2x +9

Responses

1. x2−4x + 9=0
2. x = 9
3. x2−9 =0
4. x2+4x +9 =0

Answer 1

3

assuming x2 and 2x are equivalent then rearranging the equation to equal 0 will leave you with said answer.