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OpenStudy (anonymous):
How to factorise the following expression: 49g^2-36h^2-28g-24h
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OpenStudy (anonymous):
\[49g^2-36h^2-28g-24h \rightarrow (7 g-6 h-4) (7 g+6 h)\]
OpenStudy (anonymous):
How did you get it that answer
OpenStudy (anonymous):
??
OpenStudy (anonymous):
\[\large \begin{align}49g^2-36h^2-28g-24h &=[(7g)^2-(6h)^2]-4(7g+6h)\\ &=(7g+6h)(7g-6h)-4(7g+6h)\\&=(7g+6h)(7g-6h-4)\end{align}\]
OpenStudy (anonymous):
Cheers
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OpenStudy (anonymous):
:)
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