a)x^3-9x=0 b)x^2-16x^4=0 c)x^3-3x^2-10x=0. Created by nikuiko2000. algebra-ru

A) x^3-9x=0 или Ответ: -3; 0; 3.b) x^2-16x^4=0 или Ответ: - \frac{1}{4} [/tex]; 0; \frac{1}{4}c) x^3-3x^2-10x=0 или Ответ: -2; 0; 5

a)x^3-9x=0 b)x^2-16x^4=0 c)x^3-3x^2-10x=0...

nikuiko2000 @nikuiko2000

July 2022 1 9 Report

a)x^3-9x=0
b)x^2-16x^4=0
c)x^3-3x^2-10x=0

Answers & Comments

Lestay A) x^3-9x=0
$x( x^{2}-9)=0$
$x=0$ или $x^{2}-9=0; x^{2}=9; x=3;-3.$
Ответ: -3; 0; 3.
b) x^2-16x^4=0
$x^{2}(1-16 x^{2})=0$
$x^{2} =0; x=0$ или $1-16 x^{2} =0; -16 x^{2} =-1; x^{2} = \frac{1}{16}; x= \frac{1}{4}; - \frac{1}{4}$
Ответ: - \frac{1}{4} [/tex]; 0; \frac{1}{4}
c) x^3-3x^2-10x=0
$x( x^{2} -3x-10)=0$
$x=0$ или $x^{2} -3x-10=0; D= 3^{2}+10*4= 7^{2}; x_{1}= \frac{3+7}{2}=5; x_{2}= \frac{3-7}{2}=-2$
Ответ: -2; 0; 5

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nikuiko2000 August 2022 | 0 Ответы

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