factor the polynomial

label Mathematics
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(w+5)^2 - 100

Jan 24th, 2015

(w+5)^2 - 100 = (w+5)^2 - 10^2

since a^2 - b^2 = (a+b)(a-b)

so, (w+5)^2 - 10^2 = (w+5+10)(w+5-10) = (w+15)(w-5)


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Jan 24th, 2015

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