已知a,b满足|a+1/5|+(a+b+7/10)^2=0.求(4a-b)^2-[8a(1-a)-(3a-b)(3a+b
已知实数a,b满足ab=-1/5,a+b=4/5,求a^2b+ab^2-a^3b^2-a^2b^3
已知实数a.b满足a*a-3a=1,b*b-3b=1,求2b/a+2a/b的值
已知a、b满足a^3-3a^2+5a=1,b^3-3b^2+5b=5,求a+b=?
已知有理数a,b满足1/2(a-b)²+|b-1/2|=0,求3a-7b
已知有理数a,b满足|a+b-2|+(a^2*b^2+2ab+1)=0,求代数式:(a-2b+3)(a-2b-3)-(b
已知|2a-b+1|+(3a+3/2b)^2=0求b^2/a+b/{(a/a-b-1)(a-a^2/a+b)}
已知|2a-b+1|+(3a+3/2b)^2=0求[b^2/a+b]/[(a/a-b-1)][(a-a^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)]
a-b\a+b=1\2时,求代数式a+b\3(a-b) - a-b\2(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)
已知实数a,b满足a^2-3a+1=0,b^2-3b+1=0,求a/b+b/a的值
教教我~~已知实数a,b满足a^2-3a=1,b^2-3b=1,求a/b+b/a的值