2x²-xy+3x-y+1因式分解
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2x²-xy+3x-y+1因式分解2x²-xy+3x-y+1因式分解2x²-xy+3x-y+1因式分解2x²-xy+3x-y+1=2x^2+3x+1-y(x+1
2x²-xy+3x-y+1因式分解
2x²-xy+3x-y+1因式分解
2x²-xy+3x-y+1因式分解
2x²-xy+3x-y+1
=2x^2+3x+1-y(x+1)
=(2x+1)(x+1)-y(x+1)
=(x+1)(2x-y+1)
2x²-xy+3x-y+1
＝(2x²+2x)-(xy+y)+(x+1)
＝2x(x+1)-y(x+1)+(x+1)
＝(x+1)(2x-y+1)