Factor using ac-method, 15y+6y²-21= ________

Mathematics

1 answer:

Sunny_sXe [5.5K]2 years ago

3 0

$15y+6y^2-21=\\
6y^2+15y-21=\\
3(2y^2+5y-7)=\\
3(2y^2-2y+7y-7)=\\
3(2y(y-1)+7(y-1))=\\
3(2y+7)(y-1)
$

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