|x^2+5x-6|

July 2022 1 3 Report

|x^2+5x-6|<=|78-3x|
помогите решить нерав-во с модулем ,очень нужно!!

Answers & Comments

21sadtylers X²+5x-6=0
x=-6; x=1

78-3x=0
x=26

1) x<=-6
x²+5x-6<=78-3x
x²+8x-84<=0
D=64+336=400
x=(-8±20)/2
-14<=x<=6
-14<=x<=-6

2) -6<x<=1
-x²-5x+6<=78-3x
-x²-2x-72<=0
x²+2x+72>=0
D=4-288<0
-6<x<=1

3) 1<x<=26
x²+5x-6<=78-3x
-14<=x<=6
1<x<=6

4) x>26
x²+5x-6<=-78+3x
x²-2x+72<=0
D=4-288<0
нет решений

ответ: [-14;6]

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sos pomogitezadanie chasti b v pryamougolnom treugolnike abc cd vys

v pryamougolnom treugolnike abc ugol acb90 provedeny mediana cm i vysota ch

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