上面的是因式分解。两个题过程答案都要,谢谢!
3个回答
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x^3-9x^2+14x+24
=(x^3+1)-(9x^2-14x-23)
=(x+1)(x^2-x+1)-(x+1)(9x-23)
=(x+1)[(x^2-x+1)-(9x-23)]
=(x+1)(x^2-10x+24)
=(x+1)(x-4)(x-6)
=(x^3+1)-(9x^2-14x-23)
=(x+1)(x^2-x+1)-(x+1)(9x-23)
=(x+1)[(x^2-x+1)-(9x-23)]
=(x+1)(x^2-10x+24)
=(x+1)(x-4)(x-6)
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展开全部
=x3+1-(9x2-14x-23)
=(x+1)(x2-x+1)-(9x-23)(x+1)
=(x+1)(x2-10x+24)
=(x+1)(x-4)(x-6)
=(x+1)(x2-x+1)-(9x-23)(x+1)
=(x+1)(x2-10x+24)
=(x+1)(x-4)(x-6)
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