a+b-4a-3a-6b=

已知A=5a-3b,B=-6a+4b,A-B=? (a-b)^6*[-4(b-a)^3]*(b-a)^2÷(a-b)=求过程 a+b-4a-3a-6b= (a^2+1)(-4a^2+1)+a^4-1 3a(a-b)(a+b)-6(b-a)^2a^2-9(a-b)^2= 3a(a-b)(a+b)-6(b-a)^2= 若a-b=4,3a+2b=6,3a(a-b)+2b(a-b)=( ). 4a:6b a:b=( ):( ) (3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b) 快 (3a-6b/a+b）-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a) 已知A=5a-3b,B=-6a+4b,则A-B等于 A.-a+b,B=11a+b C.11a-7b D -a-7b 3a^2b-{2a^2b+[9a^b-(6a^2b+4a^2)]-(3a^2b-8a^2)}= a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=? a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=? 当a+2b/2a-3b=3,求代数式4b+2a/9b-6a-4a-6b/3a+6b （a-2b)/(a+2b)=3,求(a+2b)/(a-2b)+(3a-6b)/(4a+8b)的解, 已知a*a+b*b-2a+4b+5=0,求2(a+b)(a-b)+(a-b)(a-b)-(6a*a*b-2a*b*b)/(2b)的值 2a-{7b+[4a-7b-(2a-6a-4b)]-3a (a+2b)(2a+4b)(3a+6b)(4a+8b) |a|=3,|b|=4,|a+b|=-(a+b)求a-b的值