2x^2+7x+5乘以x^2-2x-3怎么算

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2x^2+7x+5乘以x^2-2x-3怎么算
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2x^2+7x+5乘以x^2-2x-3怎么算
2x^2+7x+5乘以x^2-2x-3怎么算

2x^2+7x+5乘以x^2-2x-3怎么算
你好是分解质因式吗?
=(2x+5)(x+1)*(x+1)(x-3)
=(x+1)²(2x+5)(x-3)

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