(4a^2-9b^2)(3b-2a)+9(2a+3b)^2
1.(a-b)^2(b-a)^3(a-b)^-4
当a+2b/2a-3b=3,求代数式4b+2a/9b-6a-4a-6b/3a+6b
a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=?
计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)
2b根号a/b+3/a根号a立方b-(4a根号b/a+根号9ab)
a^2b-a^3-9b+9a因式分解,
3a^2b-{2a^2b+[9a^b-(6a^2b+4a^2)]-(3a^2b-8a^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
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
计算:((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b)
(a+b)+(2a+b/2*3)+(3a+b/3*4).+(10a+b/9*10)的化简
3a+2b用a+b,a-b表示