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OpenStudy (anonymous):
7x^2-45x-28 show the working please
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OpenStudy (b2st):
are you trying to find x or.....
OpenStudy (anonymous):
\[7x ^{2}-45x-28\] \[7x ^{2}-49x+4x-28\] (split the middle term) \[7x(x-7)+4(x-7)\] \[(7x+4)(x-7)\] (factorised)
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