(3a+5b)-{9a-[6a-2a(3b-4a)]}其中a=5 又3分之2,b=10又3分之2

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(3a+5b)-{9a-[6a-2a(3b-4a)]}其中a=5 又3分之2,b=10又3分之2
(3a+5b)-{9a-[6a-2a(3b-4a)]}其中a=5 又3分之2,b=10又3分之2

(3a+5b)-{9a-[6a-2a(3b-4a)]}其中a=5 又3分之2,b=10又3分之2
(3a+5b)-{9a-[6a-2a(3b-4a)]}
=3a+5b-[9a-(6a-6ab+8a²)]
=3a+5b-(3a+6ab-8a²)
=5b-6ab+8a²
=160/3-5×17/3×32/3+8×(17/3)²
=72/9
=8

-52又9分之4

先化简得：(3a+5b)-{9a-[6a-2a*3b+2a*4a)]}=(3a+5b)-{9a-[6a-2a3b+8a²]}=(3a+5b)-（9a-6a+6ab-8a²）=5b-6ab+8a²。再把a,b的值带入得原式=7292/9

3a-5b-[9a-6a-6ab+8a^2]=3a-5b-3a+6ab-8a^2=-8a^2+6ab-5b=-8*(17/2)^2+6*17/2*32/2-5*32/2=158

先化简，原式=3a+5b-9a+6a-6ab+8a^2=8a^2-6ab+5b=8*(17/3)*(17/3)-6*(17/3)*(32/3)+5*(32/3)=-472/9

5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b) 对任意自然数a,b,规定a#b=2*a+b,若a#2a#3a#4a#5a#6a#7a#8a#9a=3039,则A=（） (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= 对任意自然数a,b,规定a#b=2*a+b,若a#2a#3a#4a#5a#6a#7a#8a#9a=2026 3a 2b 5a 9b-8a 5a+{3b+[6c-2a-2(a-c)]}-[9a-(7b+c)] 5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c）] 5a-｛-3b+[6c-2a-(a-c)}-[9a-(7b+c)] 5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)] 计算：5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)] a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a= 2a-{6a+[5b-3a-(-5b-3a)}-5a} 化简多项式a-2a+3a-4a+5a-...+99a-100a用下面方法解决 a-(a+b)+(a+2b)-(a+3b)+...-(a+101b)解法1：a-2a+3a-4a+5a-..+99a-100a =(a+3a+5a+..+99a)+(-2a-4a-6a-...-100a)=2500a-2550a=-50a解法2：a-2a+3a-4a+5a-...+99a-100a=(a-2a)+(3a-4a)+(5a-6a)+.. 因式分解:(a+1)(a+3)(a+5)(a+7)+15 a(a-b+2)-6b(b+1)(a+1)(a+3)(a+5)(a+7)+15a(a-b+2)-6b(b+1) A-B A+B 2B+A 3A-B 6A+2B 2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]过程 a^2+5(a-b)(a+b)-(3a-2b)^2+9b^2,化简 (a-b)5次方×(b-a)3次方+(a-b)2次方×(a-b)6次方