In solving the eqaution(x+4)(x-4),Eric stated thatthe solution would be x+4=33=>x=29

Question

or
(x-4)=33=>x=37
However, at least one of these solutions fails to work when substituted back into the original eqaution. Why is that?Help Eric to understand better,solve the problem and explain your reasoning

Answer 1

(x+4)(x-4) is not an equation. An equation requires an equal sign (=).

Answer 2

I meant (x+4)(x-4)=33 thanks

Answer 3

To solve, it must = 0.

Does that help?

Answer 4

yes thanks