提取公因式例题:3x+6+x+y+xy+1 =3(x+2)+(x+xy)+(y+1) ① =3(x+2)+x(1+y)+(y+1) ②=3(x+2)+(x+1)(y+1) ③(X+XY)这里怎变X (1+Y) 在变(X+1)
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![提取公因式例题:3x+6+x+y+xy+1 =3(x+2)+(x+xy)+(y+1) ① =3(x+2)+x(1+y)+(y+1) ②=3(x+2)+(x+1)(y+1) ③(X+XY)这里怎变X (1+Y) 在变(X+1)](/uploads/image/z/8806612-4-2.jpg?t=%E6%8F%90%E5%8F%96%E5%85%AC%E5%9B%A0%E5%BC%8F%E4%BE%8B%E9%A2%98%EF%BC%9A3x%2B6%2Bx%2By%2Bxy%2B1+%3D3%EF%BC%88x%2B2%EF%BC%89%2B%EF%BC%88x%2Bxy%EF%BC%89%2B%EF%BC%88y%2B1%EF%BC%89+%E3%80%80%E2%91%A0%E3%80%80%3D3%28x%2B2%29%2Bx%EF%BC%881%2By%EF%BC%89%2B%EF%BC%88y%2B1%EF%BC%89+%E3%80%80%E3%80%80%E2%91%A1%3D3%28x%2B2%29%2B%EF%BC%88x%2B1%EF%BC%89%EF%BC%88y%2B1%EF%BC%89+%E2%91%A2%28X%2BXY%29%E8%BF%99%E9%87%8C%E6%80%8E%E5%8F%98X+%281%2BY%29+%E5%9C%A8%E5%8F%98%28X%2B1%29)
提取公因式例题:3x+6+x+y+xy+1 =3(x+2)+(x+xy)+(y+1) ① =3(x+2)+x(1+y)+(y+1) ②=3(x+2)+(x+1)(y+1) ③(X+XY)这里怎变X (1+Y) 在变(X+1)
提取公因式
例题:3x+6+x+y+xy+1
=3(x+2)+(x+xy)+(y+1) ①
=3(x+2)+x(1+y)+(y+1) ②
=3(x+2)+(x+1)(y+1) ③
(X+XY)
这里怎变X (1+Y) 在变(X+1)
提取公因式例题:3x+6+x+y+xy+1 =3(x+2)+(x+xy)+(y+1) ① =3(x+2)+x(1+y)+(y+1) ②=3(x+2)+(x+1)(y+1) ③(X+XY)这里怎变X (1+Y) 在变(X+1)
3(x+2)+x(1+y)+(y+1)式子里,1+y=y+1,也就是公因式,所以把y+1提取出来.x(1+y)+(y+1)就变成(x+1)(y+1)
例题: 3x+6+x+y+xy+1
=3(x+2)+(x+xy)+(y+1) ①
=3(x+2)+x(1+y)+(y+1) ②【后两项提取(y+1)得(x+1)(y+1)】
=3(x+2)+(x+1)(y+1) ③
x(1+y)+(y+1)=x(1+y)+1乘以(y+1)=(1+x)(1+y)x(1+y)+(y+1)=x(1+y)+1乘以(y+1)=(1+x)(1+y) ① ② ③ 为什么①②哪里+上1就能变成乘以?什么公式? x(1+y)+1乘以(y+1)=(1+x)(1+y) 这里也不知道怎变,是公式什么的吗?...
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x(1+y)+(y+1)=x(1+y)+1乘以(y+1)=(1+x)(1+y)
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(x+xy)+(y+1)=x(1+y)+(y+1)=(x+1)(y+1)
x+xy=x(1+y)
x(1+y)+(y+1)=(x+1)(y+1)