How do you factor by grouping: $x y - 2 y + 2 x - 4$ $xy - 2y + 2x - 4$ ?

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How do you factor by grouping: $x y - 2 y + 2 x - 4$ $xy - 2y + 2x - 4$ ?

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Answer 1 · 2015-04-18T21:43:51

Collect $y$ $y$ between the first and second and $2$ $2$ between the third and fourth:
$y (x - 2) + 2 (x - 2) =$ $y(x-2)+2(x-2)=$
Collect $(x - 2$ $(x-2$ ;
$= (x - 2) (y + 2)$ $=(x-2)(y+2)$

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How do you factor by grouping: $x y - 2 y + 2 x - 4$ $xy - 2y + 2x - 4$ ?

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