Найти среднеарифметическое корней уравненияy2-10y-39. Created by abzalovarezeda. algebra-ru

Найти среднеарифметическое корней уравненияy2-10y-39...

abzalovarezeda @abzalovarezeda

August 2021 1 21 Report

Найти среднеарифметическое корней уравнения
y2-10y-39

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$y^2-10y-39=0\\D=(-10)^2-4*1*(-39)=256=16^2\\y_{1}=(10+16):2=13\\y_{2}=(10-16):2=-3\\\\ \frac{y_{1}+y_{2}}{2}= \frac{13+(-3)}{2}= \frac{10}{2}=5$

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igralnuyu kost brosayut dvazhdy najdite veroyatnost togo chto odin raz vypalo chisl

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