1-x=2x+3 помогите срочно...

Rosalee @Rosalee

August 2022 1 9 Report

X+1/1-x=2x+3 помогите срочно

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jekadva

Verified answer

X+1=(2x+3)(1-x).....
x+1=2x-2x^2+3-3x....
x+1=-2x^2-x+3....
-2x^2-2x+2=0
2x^2+2x-2=0
x^2+x-1=0
d=1-4*(-1)=1+4=√5
x1=(-1+√5)/2
x2=(-1-√5)/2
=========================
$x+1=(2x+3)*(1-x) \\ x+1=2x-2 x^{2} +3-3x \\ x+1=-2 x^{2} -x+3 \\ -2 x^{2} -2x+2=0 \\ 2 x^{2} +2x-2=0 \\ x^{2} +x-1=0 \\ \sqrt{D} = 1^{2} -4*1*(-1)= \sqrt{5} \\ x_{1} = \frac{-1+ \sqrt{5} }{2} \\ x_{2} = \frac{-1- \sqrt{5} }{2}$

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Rosalee Спасибо большое

jekadva исправь на корень из 5

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