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OpenStudy (cjackson):
reduce x2 - x = 20
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OpenStudy (anonymous):
\[x^{2}\]-x-20=0 thus giving (x-5)(x+4)=0 so x=5 or x=-4
OpenStudy (anonymous):
\[x^2-x-20=0\] Gives - \[(x-5)(x+4)\] thus \[x=5\] or \[x=-4\]
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