因式分解x²+2xy-3y ²+3x +y +2

彭锐2022-10-04 11:39:541条回答

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zizaihuni 共回答了12个问题 | 采纳率83.3%
x^2+2xy-3y^2+3x+y+2
=(x^2+2xy-3y^2)+x+3y+2x-2y+2
=(x+3y)(x-y)+(x+3y)+2(x-y+1)
=(x+3y)(x-y+1)+2(x-y+1)
=(x+3y+2)(x-y+1)
1年前

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