(2a-3b)(a+5b)
5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b)5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b)=5a²b-15a²b-2a²b+14ab²=-12a²
2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]过程2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]=2(a+b)-(a+b)-6(a-b)=(a+b)-6(a-b)=a+b-6a+6b=
计算(5a-3b)^2+(a+b)(a-b)原式=25a²-30ab+9b²+a²-b²=26a²-30ab+8b²(5a-3b)²+(a+b)(a-b)=(25a
2a+b/3a+5b求a/b2a+b=3a+5b2a-3a=5b-b-a=4ba=-4b∴a/b=(-4b)/b=-42a+b=3a+5b2a-3a=5b-b-a=4ba=-4b∴a/b=(-4b)/b=-4
已知a-b/a+b=-3,则代数式2(a-b)/a+b-5(a+b)/a-b=?a-b/a+b=-3则a+b/a-b=-1/3所以原式=2×(-3)-5×(-1/3)=-6+5/3=-13/3因为a-b———=-3a+b则a-b1———=-
已知a-b/a+b=-3,则代数式2(a-b)/a+b-5(a+b)/a-b=?(a-b)/(a+b)=-3(a+b)(a-b)=-1/32(a-b)/(a+b)-5(a+b)/(a-b)=2×(-3)-5×(-1/3)=-6+5/3=-1
5a-3b-a+2b5a-3b-a+2b=4a-b5a-3b-a+2b=5a-a-3b+2b=4a-b
(a-2b)(5a+3b)
(a+2b)(a-2b)+(a-b)(a+b)-2(a-3b)(a-b)(a+2b)(a-2b)+(a-b)(a+b)-2(a-3b)(a-b)=(a²-4b²)+(a²-b²)-2(a²-
a+a-a+2a-3a-2b+3b-5b+3b-4b-5b-10b
因式分解(a-b)平方-3a+3b(a+b)(a-b)-2b(3a-5b)两个哈(a-b)平方-3a+3b=(a-b)^2-3(a-b)=(a-b-3)(a-b)(a+b)(a-b)-2b(3a-5b)=a^2-b^2-6ab+10b^2=
因式分解(a-b)-3a+3b(a+b)(a-b)-2b(3a-5b)(a-b)-3a+3b=(a-b)-3(a-b)=(a-b)(a-b-3)(a+b)(a-b)-2b(3a-5b)=a-b-6ab+10b=a-6ab+9b=(a-3)补
(2a-3b)[(a+b)-b(a-3b)]原式=(2a-3b)[a+b-ab+3b^2]=2a^2+2ab-2a^2b+6ab^2-3ab-3b^2+3ab^2-9b^3=2a^2-ab-2a^2b+9ab^2-3b^2-9b^3题目题盖
(2a+3b)^2-(a+5b)(a-5b)+(2a-3b)^2(2a+3b)²-(a+5b)(a-5b)+(2a-3b)^2=(4a²+12ab+9b²)-(a²-25b²)+(4a
8a+2b+(5a-b)(5a-3b)-3(a平方-2b)8a+2b+(5a-b)=8a+2b+5a-b=13a+b(5a-3b)-3(a平方-2b)=5a-3b-3a²+6b=5a+3b-3a²8a+2b+(5a-b)
5(a+b)-3(a-b)=22(a+b)+5(a-b)=7令x=a+by=a-b则5x-3y=2(1)2x+5y=7(2)(1)×5+(2)×325x+6x=10+2131x=31x=1y=(5x-2)/3=1所以a+b=1a-b=1相加
(3a^2*b-7a*b^2-a^2*b^2)*5a*b化简(3a^2*b-7a*b^2-a^2*b^2)*5a*b=15a³b²-35a²b³-5a³b³
a^2+5(a-b)(a+b)-(3a-2b)^2+9b^2,化简a^2+5(a-b)(a+b)-(3a-2b)^2+9b^2=a²+5a²-5b²-9a²+12ab-4b²+9b²
计算:(a-b)^(m)*(a-b)^(2)*[2(b-a)]^3*[(b-a)^(5)]^(2)/(a-b)^(m).(a-b)^m*(a-b)*[2(b-a)^3*(b-a)^5]^2/(a-b)^m=(a-b)*[2(b-a)^8]^
(2a-b)(3a-2b)+(b-a)(2a-5b)2A-B=11a2;12b代入得56