(3a^2*b-7a*b^2-a^2*b^2)*5a*b化简
A=B+B+B+B+B+B+B+B+B+B+B+B+B+B+B A-B×3=C C+2×7+2=1
化简:{[(2a-b)/(a+b)]-[b/(a-b)]}÷[(a-2b)/(a+b)]
化简(2a-b/a+b-b/a-b)除以a-2b/a +b
化简(2a-b/a+b-b/a-b)除以a-2b/a+b
5(a+b)-3(a-b)=2 2(a+b)+5(a-b)=7
化简 |a+b|-|3a-2b|
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
因式分解(a-b)-3a+3b (a+b)(a-b)-2b(3a-5b)
a-b+2b²/a+b
[(a+2b)(a-2b)-(2a-b)²+(3a-b)(3a-5b)]÷2a
[(a-2b)²-(a+3b)(a-2b)]/(-5b)化简.
计算:((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b)