mayvar1
mayvar1
24-03-2015
Mathematics
Answered
Solve.
x^2+y^2=9
2z^2-y^2=6
Answer :
Panoyin
Panoyin
24-03-2015
1x² + 1y² = 9
2x² - 1y² = 6
3x²
=
15
3 3
x² = 5
x ≈ 2.236
2(2.236)² - 1y² = 6
2(5) - 1y² = 6
10 - 1y² = 6
-10 -10
-1y²
=
-4
-1 -1
y² = 4
y = 2
(x, y) = (2.236,2)
(x², y²) = (5, 4)
x² + y² = 9
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