化简:(1)25(a-2b)^2-64(b+2a)^2 (2)1/8*1001-0.125
计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
化简:(1)25(a-2b)^2-64(b+2a)^2 (2)1/8*1001-0.125
(a+2b/a+b)-1化简,快
(-3a^2b)^3-8(a^2b)^2×(-a^2b),a=1,b=-1,
已知(a+b)(a+b)=8,(a-b)(a-b)=2,求(1)aa+bb; (2)aaabbb
(a+b/b-a)+(2a/a-b)-(b-a/2b)等于多少
化简:(a+b)2-(a-b)2+a(1-4b)
已知a^2+b^2-6a-8b+25=0,试求代数式(1+b/a-a/a-b)/(1-b/a-a/a+b)的值.
(1)2b²+(a+b)(a-b)-(a-b)²其中a=-3,b=1/2
化简(2a+b)^2-2(a-b)(2a-b)-1/2(2a-b)
(a+b)(a-2b)-(a+2b)(a-b)化简