1.a^2-25b^2/5ab×2a/a-5b×4b/3a+15b 2.81-a^2/a^2+6a+9÷a-9/2a+6
1.a^2-25b^2/5ab×2a/a-5b×4b/3a+15b 2.81-a^2/a^2+6a+9÷a-9/2a+6
a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b)
分解因式(a+1)(a+3)(a+5)(a+7)+15(2a+b)(4a^2-2ab+b^2)-b(2a-b)^2a^3
对任意自然数a、b,规定a*b=2×a+b.若有:a*2a*3a*4a*5a*6a*7a*8a*9a=2026,则a的值
(a-2b)(a^2-2ab+4b^2)-a(a-5b)(a+3b)
2b根号a/b+3/a根号a立方b-(4a根号b/a+根号9ab)
(3a+2b)(6a-5b)(2b-3a)(5a+6b)
[(a+2b)(a-2b)-(2a-b)²+(3a-b)(3a-5b)]÷2a
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
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)
1.(a-b)^2(b-a)^3(a-b)^-4