How do you factor by grouping $y^{2} + 7 y + 3 y + 21$ $y^2+7y+3y+21$ ?

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How do you factor by grouping $y^{2} + 7 y + 3 y + 21$ $y^2+7y+3y+21$ ?

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Answer 1 · 2015-04-21T12:36:21

Collect $y$ $y$ frm the first and third term and $7$ $7$ from the second and fourth:
$y (y + 3) + 7 (y + 3) =$ $y(y+3)+7(y+3)=$
$= (y + 3) (y + 7)$ $=(y+3)(y+7)$

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How do you factor by grouping $y^{2} + 7 y + 3 y + 21$ $y^2+7y+3y+21$ ?

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How do you factor by grouping y2+7y+3y+21y^2+7y+3y+21?

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How do you factor by grouping $y^{2} + 7 y + 3 y + 21$ $y^2+7y+3y+21$ ?