a/xy .b/yz c/a-b .1/(b-a)^21/2a .1/5a^2bb/a(b+1) a/b(b+1)2a/
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
已知(a+b)(a+b)=8,(a-b)(a-b)=2,求(1)aa+bb; (2)aaabbb
a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab
a-b\a+b=1\2时,求代数式a+b\3(a-b) - a-b\2(a+b)
1.计算:(1)(a-b)(a-c)分之2a-b-c + (b-c)(b-a)分之2b-c-a + (c-b)(c-a)
1- a+b分之a+2b
{1,a,b/a}={0,a^2,a+b}
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
1.已知a+b=2,a•b=-8,求a^2(a+b)-ab(a+b)+b^2(a+b)2.因式分解(xy+1
(a+b)/(a-b)+(a+b)/(a-b)(a-b)-(a+b)/(aa-bb)
(a,b)=1 (a,b)|c
a(a-2b)+2(a+b)(a-b)+(a+b)²,其中a=-½,b=1