饮料瓶制作小汽车图片:(2a+3b-c+1)(2a+3b+c-1)
来源:百度文库 编辑:查人人中国名人网 时间:2024/07/07 08:15:16
解:原式=[(2a+3b)-(c-1)]*[(2a+3b)+(c-1)]
=(2a+3b)^2-(c-1)^2
=4a^2+9b^2+12ab-c^2+2c-1
利用平方差公式。
=[(2a+3b)-(c-1)][(2a+3b)+(c-1)]
=[(2a+3b)(2a+3b)-(c-1)(c-1)]
=4*a*a+9*b*b+12*a*b-c*c+2*c-1
(2a+3b-c+1)(2a+3b+c-1) =[(2a+3b)-(c-1)]*[(2a+3b)+(c-1)]
=(2a+3b)^2-(c-1)^2
=4a^2+24ab+9b^2-c^2+2c-1
=[(2a+3b)-(c-1)][(2a+3b)+(c-1)]
=(2a+3b)(2a+3b)-(c-1)(c-1)
=4aa+12ab+9bb-(cc-2c+1)
==4aa+12ab+9b-cc+2c-1
原式=(2a+3b)^2-(c-1)^2
=4a^2+12ab+9b^2-c^2+2c-1
此题使用平方差和完全平方公式解决
(2a+3b-c+1)(2a+3b+c-1)
=[(2a+3b)-(c-1)]*[(2a+3b)+(c-1)]
=4a2+24ab+9b2-c2+2c-1
答题!!!!!!!!!!!!!!!!!!!!2(a*a*a-3)(a-b+c)-3(b-a*a)(a+b-c)
化简:(a+b)^2(b+c-a)(c+a - b)+(a - b)^2(a+b+c)(a+b - c)
(a-b+c)^2
化简:(2a-b-c)/(a-b)(a-c)+(2b-c-a)/(b-c)(b-a)+(2c-a-b)/(c-a)(c-b)
(2a+3b-c+1)(2a+3b+c-1)
已知△ABC中,A:B:C=1:2:3,那么a:b:c=?
2a-b-c/(a-b)(a-c)+ab -c-a/(b-c)(b-a)+2c-a-b/(c-a)(c-b)
(a+b)(a-b)+a(2b-c)因式分解
已知:(a+b+c)^2=3(a^2+b^2+c^2),求证:a=b=c
若a:b=2:3 b:c=1:2 且a+b+c=33求a.b.c分别是多少?