30 балов! х1 , х2 - корени уравнения х^2 + 12х + 19 = 0 Решить 3х1х2 - х1 - х2 = ?. Created by pyurtrqyet. algebra-ru

X²+12x+19=0D=144-76=683(-6-√17)(-6+√17)+6+√17+6-√17=3(36-17)+12=69

30 балов! х1 , х2 - корени уравнения х^2 + 12х + 19 = 0 Решить 3х1х2 - х1

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30 балов! х1 , х2 - корени уравнения
х^2 + 12х + 19 = 0
Решить 3х1х2 - х1 - х2 = ?

Answers & Comments

fadarm

Verified answer

X²+12x+19=0
D=144-76=68
$x_{1}= \frac{-12- \sqrt{68}}{2}=-6- \sqrt{17}$
$x_{2}= \frac{-12+ \sqrt{68}}{2}=-6+ \sqrt{17}$
3(-6-√17)(-6+√17)+6+√17+6-√17=3(36-17)+12=69

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Verified answer

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tex na promezhutke 13

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