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13-04-2022
Mathematics

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

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loneguy loneguy

13-04-2022

[tex]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}[/tex]

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