湖北武汉横林初级中学:因式分解

来源:百度文库 编辑:高校问答 时间:2024/04/30 17:28:45
a^2+(a+1)^2+2(a+a^2)

a^2+(a+1)^2+2(a+a^2)
=a^2+a^2+2a+1+2a+2a^2
=3a^2+4a+1
=(3a+1)(a+1)

a^2+(a+1)^2+2(a+a^2)
=a^2+2(a+a^2)+(a+1)^2
=a^2+2*a*(a+1)+(a+1)^2
=[a+(a+1)]^2
=(2*a+1)^2

a^2+(a+1)^2+2(a+a^2)
=a^2+a^2+2a+1+2a+2a^2
=4a^2+4a+1
=4(a^2+a)+1