Question

Percy solved the equation x^2 + 7x + 12 = 12. His work is shown below. Is Percy correct? Explain.

Answer 1

No. To solve the equation it needs to be set to 0.
1. x^2 +7x = 0
Then the GCF needs to be found
2. x(x+7) = 0
Set each to 0
3. x= 0 or x+7=0
Solve for x
4. x=0 or x=-7