(0.25a^2b-1/2a^3b^2-1/6a^4b^3)÷(-0.5a^2b)
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-b\a+b=1\2时,求代数式a+b\3(a-b) - a-b\2(a+b)
已知2a-b+1的绝对值+(3a+3/2b)^=0,求(b^/a+b)÷{[(b/a-b)+1][a-(a^/a+b)]
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
计算:(b/a)^2÷(a/b)-b^3/a^3(a-b) ÷ 1/a-b
计算a^-2b^-3*(-3a^-1b^2)÷6a^-4b^-2
先化简,再求值:(2a-b)^2-(2a+b)(a-b)-3(a-3b)(a+3b),其中|a-1|+b^2=6b-9
1.(a-b)^2(b-a)^3(a-b)^-4
1,已知3a-b=6,求[(4a平方+b平方)-(2a-b)平方+2b(a-b)]÷b,
(2a+b)(2a-b)+3(2a-b)²+(-3(4a-3b)+3a-b)(2a-b)其中a=-1
(a+2/1b)(a-2/1b)-(3a-2b)(3a+2b)
(a+2b)(2a+4b)(3a+6b)(4a+8b)