7a^3-(6a^3-3a^3b)+3a^3+6a^3b-(3a^2b+10a)+3;{a=2,b=1/3}
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7a^3-(6a^3-3a^3b)+3a^3+6a^3b-(3a^2b+10a)+3;{a=2,b=1/3}
7a^3-(6a^3-3a^3b)+3a^3+6a^3b-(3a^2b+10a)+3;{a=2,b=1/3}
7a^3-(6a^3-3a^3b)+3a^3+6a^3b-(3a^2b+10a)+3;{a=2,b=1/3}
7a^3-6a^3b+3a^2b+3a^3+6a^3b-3a^2b-10a^3+3 =(7a^3+3a^3-10a^3)+(-6a^3b+6a^3b)+(3a^2b-3a^2b)+3 =0+0+0+3 =3 所以a和b的值是多余的
5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b)
(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b) 快
(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
2a-{7b+[4a-7b-(2a-6a-4b)]-3a
(2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/a]
化简:[2/3a - 2/(a+b) * (a+b/3a - a - b)] / (a-b)/a
A-B A+B 2B+A 3A-B 6A+2B
(a+2b)(a-2b)+(a-b)(a+b)-2(a-3b)(a-b)
因式分解:(a+1)(a+3)(a+5)(a+7)+15 a(a-b+2)-6b(b+1)(a+1)(a+3)(a+5)(a+7)+15a(a-b+2)-6b(b+1)
(2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/b]
因式分解:3b(b-a)+6a(a-b)^2
对任意自然数a,b,规定a#b=2*a+b,若a#2a#3a#4a#5a#6a#7a#8a#9a=3039,则A=()
已知a+b/a-b=7,求2*(a+b)/a-b-a-b/3*(a+b)的值
因式分解:1、a*a*a*a+2a*a*a*b+3a*a*b*b+2a*b*b*b+b2、(a+1)(a+3)(a+4)(a+6)-280
3(a-b)的平方-7(a-b)+8(a-b)的平方+6(a-b) a-b=2
(-a+b)^7 除以 (b-a)^3
-3a>-6b,则a( )b
(a-3)-a(a-b) 化简