七下几道数学题,超急的
①(a²-4)÷(a+2)=
②(x²+2xy+y²)÷(x+y)=
③【(a-b)²+2(b-a)】÷(a-b)=
解下列方程
①:x²-2x=0 ②:4x²=(x-1)²
人气:291 ℃ 时间:2020-05-25 06:58:41
解答
a-2
x+y
a-b-2
x=0或x=2
x=-1或x=1/3
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