решите 3 квадратных уравнения x^2+3x-4=0 2x^2-10x+8=0 2x^2+5x-3=0. Created by znatok1413. matematika-ru

решите 3 квадратных уравнения x^2+3x-4=0 2x^2-10x+8=0 2x^2+5x-3=0...

znatok1413 @znatok1413

August 2022 1 19 Report

решите 3 квадратных уравнения
x^2+3x-4=0
2x^2-10x+8=0
2x^2+5x-3=0

Answers & Comments

dustInEyes

Verified answer

x^2+3x-4=0
Д=9+16=25
√Д=5
х1=(-3+5)/2=1
х2=(-3-5)/2=-4
__________________
2x^2-10x+8=0
x^2-5x+4=0

Д=25-16=9
√Д=3
х1=(5+3)/2=4
х2(5-3)/2=1

_________________
2x^2+5x-3=0
Д=25+24=49
√Д=7
х1=(5-7)/4=-2/4=-1/2
х2=(5+7)/4=12/4=3

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znatok1413 спасибо

dan treugolnik abc u kotorogo a 25 b22 c100 1 pust ak bissektri51259300c2d4339a5ba45fe3926ce2cd 26992

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Answers & Comments

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