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When I asked to factor the x^2-100 a student give the answer (x-10)(x-10). What is wrong with this answer?

When I asked to factor the x^2-100 a student give the answer (x-10)(x-10). What is wrong with this answer?
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2 votes
When I asked to factor the x^2-100 a student give the answer (x-10)(x-10). What is wrong with this answer?

User Mohamed Samy
by
8.3k points

1 Answer

4 votes

Using difference of squares, the factorization is
(x-10)(x+10), not
(x-10)(x-10).

User Alr
by
8.5k points
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