Asked by Sonya

In solving the eqaution(x+4)(x-4),Eric stated thatthe solution would be x+4=33=>x=29
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
Answered by PsyDAG
(x+4)(x-4) is not an equation. An equation requires an equal sign (=).
Answered by Mike
I meant (x+4)(x-4)=33 thanks
Answered by PsyDAG
To solve, it must = 0.

Does that help?
Answered by Sonya
yes thanks
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