(2a+3b-1)(1+2a-3b)+(1+2a-3b)的平方
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 10:25:49
![(2a+3b-1)(1+2a-3b)+(1+2a-3b)的平方](/uploads/image/z/11489163-51-3.jpg?t=%282a%2B3b-1%29%281%2B2a-3b%29%2B%281%2B2a-3b%EF%BC%89%E7%9A%84%E5%B9%B3%E6%96%B9)
x)0J6N506J5NԆ|>ϦI*'Z~
L3+ +2uLLu@l|DTQR$h<̢h$ADDO@(8]$m#dQDDFF6PQbP~qAb(郔
(2a+3b-1)(1+2a-3b)+(1+2a-3b)的平方
(2a+3b-1)(1+2a-3b)+(1+2a-3b)的平方
(2a+3b-1)(1+2a-3b)+(1+2a-3b)的平方
(2a+3b-1)(1+2a-3b)+(1+2a-3b)^2
=[2a+(3b-1)][2a-(3b-1)]+(1+2a-3b)^2
=(2a)^2-(3b-1)^2+(1+2a-3b)^2
=4a^2+(1+2a-3b)^2-(3b-1)^2
=4a^2+[(1+2a-3b)-(3b-1)][(1+2a-3b)+(3b-1)]
=4a^2+(1+2a-3b-3b+1)(1+2a-3b+3b-1)
=4a^2+2a(2a-6b+2)
=4a^2+4a(a-3b+1)
=4a(a+a-3b+1)
=4a(2a-3b+1)
=8a^2-12ab+4a