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)) y 32x) 2y°—5y“—19y+42 |
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Answer» 2y*y*y - 5y*y - 19y + 42 = 2y*y*y - 4y*y - y*y + 2y - 21y + 42 = 2y*y(y-2)-y(y-2)-21(y-2) = (2y*y-y-42)(y-2) = (2y*y+6y-7y-42)(y-2) = (2y-7)(y+6)(y-2) |
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