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分解因式2x^3+xy-3y^2+x+14y-15
题目详情
分解因式2x^3+xy-3y^2+x+14y-15
▼优质解答
答案和解析
原式=7x+xy+8y-15
=x(y+7)+8y-15
=x(y+7)+8(y+7)-8×7-15
=(x+8)(y+7)-71
=x(y+7)+8y-15
=x(y+7)+8(y+7)-8×7-15
=(x+8)(y+7)-71
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