Rozwiąż algebraicznie podany układ rownań:
(x-2)^2 - 2(x-2y) = 1 - (3-x)(3+x)
2x+y = 4
Te dwa równania są w klamerce.
Ma wyjść x=2 i y=0
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x^2 - 4x + 4 - 2x + 4y = 1 - ( 9 + 3x - 3x - x^2 )
y = 4 - 2x
x^2 - 4x + 4 - 2x + 4y = 1 -9 - 3x + 3x + x^2
y = 4-2x
-4x + 4 - 2x + 4y = 1 - 9
y = 4 - 2x
-6x = -12 - 4(4 - 2x)
y = 4 - 2x
-6x = -12 - 16 + 8x
y = 4 - 2x
-14x = -28 / : (-14)
x = 2
y= 4 - 4 = 0