3x²-9x-12/x²+2x+1将其化简?
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![3x²-9x-12/x²+2x+1将其化简?](/uploads/image/z/952591-31-1.jpg?t=3x%26%23178%3B-9x-12%2Fx%26%23178%3B%2B2x%2B1%E5%B0%86%E5%85%B6%E5%8C%96%E7%AE%80%3F)
3x²-9x-12/x²+2x+1将其化简?
3x²-9x-12/x²+2x+1将其化简?
3x²-9x-12/x²+2x+1将其化简?
3x²-9x-12/x²+2x+1
=3(x+1)(x-4)/(x+1)²
=(3x-12)/(x+1)
(3x²-9x-12)/(x²+2x+1)
=[3(x²-3x-4)]/(x²+2x+1)
=[3(x+1)(x-4)]/(x+1)²
=[3(x-4)]/(x+1)
原式=3(x+1)(x-4)/(x+1)(x+1)=3(x-4)/(x+1)