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OpenStudy (anonymous):
x2-9x+20 is it (x-5) (x-4)?
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OpenStudy (anonymous):
yes, it comes after factorisation
OpenStudy (anonymous):
YA EXACTLY
OpenStudy (anonymous):
yep
OpenStudy (anonymous):
Yeah, x * x = x^2 x * -4 = -4x -5 * x = -5x -5 * -4 = 20 x^2 - 4x - 5x + 20 x^2 - 9x + 20
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