227,069 views
43 votes
43 votes
when asked to factor the x^2 - 100, a student gives the answer (x -10) (x-10). what is wrong with this answer?

User Michael Wildermuth
by
3.0k points

1 Answer

11 votes
11 votes


x^2-100\\\\=x^2-10^2\\\\=(x+10)(x-10)\\\\\text{The difference of two squares formula is}~ a^2 -b^2 =(a+b)(a-b),\\\\\text{So, the student did not apply it properly}

User Saric
by
2.6k points
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