(a-b)/(2a+2b)-(a2+b2)/(a2-b2) 通分计算
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/08 18:43:42
(a-b)/(2a+2b)-(a2+b2)/(a2-b2) 通分计算
![(a-b)/(2a+2b)-(a2+b2)/(a2-b2) 通分计算](/uploads/image/z/15157081-1-1.jpg?t=%28a-b%29%2F%282a%2B2b%29-%28a2%2Bb2%29%2F%28a2-b2%29+%E9%80%9A%E5%88%86%E8%AE%A1%E7%AE%97)
(a-b)/(2a+2b)-(a2+b2)/(a2-b2)
=(a-b)/2(a+b)-(a2+b2)/(a+b)(a-b)
=[(a-b)2-2(a2+b2)/[2(a+b)(a-b)]
=(-a2-2ab-b2)/[2(a+b)(a-b)]
=-(a+b)2/[2(a+b)(a-b)]
=-(a+b)/(2a-2b)
=(a-b)/2(a+b)-(a2+b2)/(a+b)(a-b)
=[(a-b)2-2(a2+b2)/[2(a+b)(a-b)]
=(-a2-2ab-b2)/[2(a+b)(a-b)]
=-(a+b)2/[2(a+b)(a-b)]
=-(a+b)/(2a-2b)
2a-3b/b2-a2 -a+3b/a2-b2 +a+2b/a2-b2
代数式(a2-b2)2-2(a2+b2)(a+b)2
若a2+b2+a-2b+54
计算:a2-2ab/-ab+b2÷(a2/a-b÷2ab/2b-a)
因式分解a2-a-b2-b
已知a2+b2=2a-2b-2,求a2+b2的值.
已知a+b-2=0 求代数式(a2-b2)2-8(a2+b2)的值
如果b分之a=2,求a2+b2分之a2-ab+b2
A/B=2 A2+B2/A2+B2-AB等于多少?
3a2+ab-2b2=0,求a/b-b/a-(a2+b2)/ab (a,b不等于0)
先化简,在求值:4ab-3b2-{【a2+b2】-{a2-b2】};其中·a=-2,b=3
如果a分之b等于二,计算a2+b2分之a2-ab+b2等于