化简2(3a+6b)+(-5a-7b)
(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b
(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
(3a+2b)(6a-5b)(2b-3a)(5a+6b)
5(a+b)-3(a-b)=2 2(a+b)+5(a-b)=7
因式分解:(a+1)(a+3)(a+5)(a+7)+15 a(a-b+2)-6b(b+1)
若a,b满足|a+5b-2|+(a+b-6)²=0,求代数式(a-3b)(a+2b)-(a+5b)(a+3b)
5a-(-2a+3-b)+2b-1 化简:7-[5-﹙3a-2b﹚+a]+a
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
[(a-2b)²-(a+3b)(a-2b)]/(-5b)化简.
计算:(-2a^2b)^2-(3a^3b^2)÷5a^2b^2+7a^9b^6÷2a^5b^4
有理数a,b,且a>b,定义:(a,b)=b,[a,b]=a,例如:(6,2)=2,[5,3]=5,试求[+7,(
化简2a-[3a-5a-(2a-7b)]等于( ).A、-7a+10b B、5a+4b C、-a-4b D、9a-10b