ppts.net
当前位置:首页>>关于因式分解x的平方减3的资料>>

因式分解x的平方减3

1-x^3=(1-x)(1+x+x^2)谢谢采纳!

x²-2x-3 =(x²-2x+1)-4 =(x-1)²-4 =(x-1+2)(x-1-2) =(x+1)(x-3)

(X-2)^2=9(X+3)^2 ,即(X-2)^2=(3X+9)^2(注:9是3的平方,移到括号内),移项 (X-2)^2-(3X+9)^2=0,利用平方差公式,进行因式分解: (X-2+3X+9)(X-2-3X-9)=0 (4X+7)(-2X-11)=0 4X+7=0或-2X-11=0 解,得:X=-7/4 或 X=-11/2

1-x^3 =(1-x)(1+x+x^2)

因数分解X³-1=(X-1)(X²+X+1) 推算如下: X³-1 =X³-X²+X²-X+X-1 =X²(X-1)+X(X-1)+(X-1) =(X-1)(X²+X+1)

x” - x - 12 = x” + 3x - 4x - 12 = x( x + 3 ) - 4( x + 3 ) = ( x + 3 )( x - 4 ) 或者 = x” - 4x + 3x - 12 = x( x - 4 ) + 3( x - 4 ) = ( x + 3 )( x - 4 ) 或者配方 = (1/4)[ 4x” - 4x - 48 ] = (1/4)[ 4x” - 4x + 1 - 49 ] = (1/4)[ ( 2x...

(x+3)²-5(x+3)+6=0 (x+3-2)(x+3-3)=0 x(x+1)=0 x=0,或者,x=-1

x²-3x-1 =x²-3x+2.25-3.25 =(x-1.5)²-(2分之√13)² =(x-2分之3+2分之√13)(x-2分之3-2分之√13) =(4分之1)(2x-3+√13)(2x-3-√13)

十字相乘

网站首页 | 网站地图
All rights reserved Powered by www.ppts.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com