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y^2 - y - 12
Break the expression into groups:
(y^2+3y)+(-4y-12)
Factor out y from y^2+37:
y^2+37 = y(y+3)
Factor out -4 from -4y-12:
-4y-12 = -4(y+3)
y(y+3)-4y-12
Factor out common term y+3:
(y+3)(y-4)
Your Answer Is (y+3)(y-4)
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