-(4a+8b)-(6-3a+4b)去括号

-8a^4b+6a^3b^2-2a^3b=-2a³b(4a-3b+1）

(3a-6b)/a+b-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)=[(3a-6b)-(4a-5b)]/(a+b)-[(5a-6b)-(7a-8b)/(a-b)]=-(a+

3a^2b-{2a^2b+[9a^2b-(6a^2b+4a^2)]-(3a^2b-8a^2)}=3a^2b-2a^2b-[9a^2b-(6a^2b+4a^2)]+(3a^2b-8a^2)=a^2b-9

如果a-2b/a+2b=3,a+2b/a-2b+3a-6b/4a+8b=1/3+3(a-2b)/4(a+2b)=1/3+3/4×3=1/3+9/4=4/12+27/12=31/12;很高兴为您解答,s

原式=10(2a+b)²-9(2a+b)=10×(-3/2+1/2)²-9×(-3/2+1/2)=10+9=19

因为a*b=2×a+b，所以：a*2a=2a+2a=4a，4a*3a=4a×2+3a=11a，11a*4a=11a×2+4a=26a，26a*5a=26a×2+5a=57a，57a*6a=57a×2+

3a+4b/a-b+3b/b-a-4a/a-b=（3a+4b-3b-4a）/(a-b)=(b-a)/(a-b)=-1在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.

a-2b/a+2b=3a-2b=3（a+2b)a-2b=3a+6b-2a=8ba=-4b所以,2+(2b/a)-2b+3a-(6b/4a)+8b=2+（2b/-4b）-2b+3（-4b)-（6b/-1

=24*(a+2b)^4

即a+4√ab=3√ab+6ba+√ab-6b=0(√a-2√b)(√a+3√b)=0√a=2√b,√a=-3√b因为根号大于0所以√a=-3√b不成立所以√a=2√ba=4b√ab=2b所以原式=(

A+2B-3C=4,5A-6B+7C=8由上两式可得A=C/8B=11C/8A:B:C=1:11:82A-3C／A+2B=-22/23

最终结果等于1.(3a-6b)/(a+b)-(4a-5b)/(a+b)-(5a-6b)/(a-b)-(7a-8b)/(b-a)=(3a-6b-4a+5b)/(a+b)-(5a-6b)/(a-b)+(7

原式a^2x-4ax-b^2-6b=9-4xa^2x-4ax=b^2+6b+9因为方程有无数解,则未知项系数和为0,且常数项为0则a^2-4a=0,b^2+6b+9=0解得a=0或4,b=-3（分母不

2(2A+B)-3(A+B)=4A+2B-3A-3B=A-B=5a^3b+2a^4-3a^2b-ab^3-(6ab^3-8a^3b+3a^4-5b^4)=-a^4+13a^3b-3a^2b-7ab^3

原式=[8(a+b)^6-4(a+b)^4-(a+b)^3]÷[2(a+b)^3]=4(a+b)^3-2(a+b)-1/2.

原式=a^2+b^2-6a-8b+9+16=0a^2+9-6a+b^2+16-8b=0(a-3)^2+(b-4)^2=0a-3=0,b-4=0a=3,b=43a+4b=3*3+4*4=25

因为（a-2b)/(a+2b)=3所以(a+2b)/(a-2b)=1/3且(3a-6b)/(4a+8b)=3(a-2b)/4(a+2b)=(3/4)*3=9/4所以所求答案为31/12

(3a-6b)/(a+b)-(5a-6b)/(a-b)-(4a-5b)/(a+b)-(7a-8b)/(a-b)=(3a-6b)/(a+b)-(4a-5b)/(a+b)-(5a-6b)/(a-b)-(7

化简的=(3a-6b-4a+5b)/(a+b)-(5a-6b-7a+8b)/(a-b)=(-a-b)/(a+b)-(-2a+2b)/(a-b)=-1-(-2)=1