Proszę o rozwiązanie układu równań.
Na dziś jeszcze. Prosze.
x^2 + y^2 - 2 x - 6y + 9 = 0
x^2 + y^2 + 2 x - 2 y - 3 = 0
--------------------------------------- odejmujemy stronami
- 4 x - 4y + 12 = 0 / : (-4)
x + y - 3 = 0
y = 3 - x
---------
Wstawiam za y do II równania
x^2 + ( 3 - x)^2 + 2 x - 2*( 3 - x) - 3 = 0
x^2 + 9 - 6 x + x^2 + 2 x - 6 + 2 x - 3 = 0
2 x^2 - 2 x = 0
2x*( x - 1) = 0
x = 0 lub x = 1
================
y = 3 - 0 = 3 lub y = 3 - 1 = 2
================================
Odp.
x = 0 , y = 3 lub x = 1, y = 2
===================================
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x^2 + y^2 - 2 x - 6y + 9 = 0
x^2 + y^2 + 2 x - 2 y - 3 = 0
--------------------------------------- odejmujemy stronami
- 4 x - 4y + 12 = 0 / : (-4)
x + y - 3 = 0
y = 3 - x
---------
Wstawiam za y do II równania
x^2 + ( 3 - x)^2 + 2 x - 2*( 3 - x) - 3 = 0
x^2 + 9 - 6 x + x^2 + 2 x - 6 + 2 x - 3 = 0
2 x^2 - 2 x = 0
2x*( x - 1) = 0
x = 0 lub x = 1
================
y = 3 - 0 = 3 lub y = 3 - 1 = 2
================================
Odp.
x = 0 , y = 3 lub x = 1, y = 2
===================================