y= |5x+15|-x^2-6x-45 найдите нули функции. Created by Diman1122. algebra-ru

y= |5x+15|-x^2-6x-45 найдите нули функции...

Diman1122 @Diman1122

August 2022 1 16 Report

y= |5x+15|-x^2-6x-45 найдите нули функции

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При y = 0 имеем |5x+15|-x^2-6x-45=0
|5x+15|=x^2+6x+45

1) 5x+15=x^2+6x+45
x^2+x+30=0
D = 1^2 - 4 * 30 < 0, корней нет

2) -5х-15=х^2+6x+45
x^2+11x+60=0
D = 11^2-4*60=121-240<0, корней нет

Ответ: нулей нет

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