1.﹙x+1﹚﹙x-3﹚=x﹙2x+3﹚-﹙x2-1﹚ 2.x﹙x-2﹚=﹙x+3﹚﹙x-1﹚ 求x的值,
1个回答
1.x^2-2x-3=2x^2+3x-x^2+1
x^2-2x-3=x^2+3x+1
5x=-4
x=-4/5
2.x^2-2x=x^2+2x-3
4x=3
x=3/4
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