Решить систему методом алгебраического сложения.. Created by samproleplay2. algebra-ru

Решить систему методом алгебраического сложения...

fronkk8

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Verified answer

2х-у=3
+
х+у=6
=
3х=9
х=3

3×2-у=3
6-у=3
у=6-3
у=3

${x}^{2} + 2 {y}^{2} = 5$
+
${y}^{2} - {x}^{2} = - 2$
=
$3 {y}^{2} = 3$
${y}^{2} = 3 \div 3$
${y}^{2} = 1$
$y = 1$

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