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OpenStudy (anonymous):
x^2-2x-15=0 factor
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OpenStudy (anonymous):
what * what = -15 and what + what = -2 using the same two numbers
OpenStudy (anonymous):
5 and -3
OpenStudy (anonymous):
what is -3 + 5?
OpenStudy (anonymous):
-5 and +3 then
OpenStudy (anonymous):
yep and you know that x * x = x^2 so our factor would be (x-5)(x+3)
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OpenStudy (anonymous):
that's the answer?
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