作业帮化简求值x^2十2x十1/x十2÷x^2-1/x-1-x/x十2,x竽等于根号3
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化简求值x^2十2x十1/x十2÷x^2-1/x-1-x/x十2,x竽等于根号3
化简求值x^2十2x十1/x十2÷x^2-1/x-1-x/x十2,
x竽等于根号3
化简求值x^2十2x十1/x十2÷x^2-1/x-1-x/x十2,x竽等于根号3
(x²+2x+1)/(x+2)÷(x²-1)/(x-1)-x/(x+2)
=(x²+2x+1)/(x+2)÷(x²-1)/(x-1)-x/(x+2)
=(x+1)²/(x+2)÷(x+1)(x-1)/(x-1)-x/(x+2)
=(x+1)²/(x+2)*1/(x+1)-x/(x+2)
=(x+1)/(x+2)-x/(x+2)
=(x+1-x)/(x+2)
=1/(x+2)
担心手机不显示平方符号,图片格式为
化简求值x^2十2x十1/x十2÷x^2-1/x-1-x/x十2,x竽等于根号3
X.(X十1)x(X十2)x(x十3) =360
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2(x十2)
x^2十2x十1=4
（X的平方十X十1）（X的平方十X十2）一12
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x十y+2x十2y一1x十7y=
1十x=x十1十2x解方程
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先化简再求值(X+3)的平方十(2十x)(2一x),其中x=-2
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