Решите систему уравнений : x+y=20 x^2+y^2=20. Created by GoldenTiran. algebra-ru

Решите систему уравнений : x+y=20 x^2+y^2=20...

July 2022 1 2 Report

Решите систему уравнений :

x+y=20
x^2+y^2=20

Answers & Comments

lol2246 Второе умножаем на два и складываем с первым
x^2+2xy+y^2=36
(x+y)^2=36
xy=8

x+y=6 x+y=-6
x*y=8 x*y=8
x1=2 x2=4 x3=-2 x4=-4
y1=4 y2=2 y3=-4 y4=-2
(2;4) (4;2) (-2;-4) (-4;-2)

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b)...

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Answers & Comments

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reshite sistemu uravnenij xy20 x2y220

v 150 grammah rastvora povarennoj soli soderzhitsya 30 grammov soli raschitajte ma

x24x 21 ne imeet smysla

napishite pozhalujsta mini sochinenie dazhe mikro predlozhenij 5 7 po sleduyushem

b)...

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