Wykonaj równania:
1) 2(x-2)^2=(x-3)(x+3)-(8x-x^2-3)
2) (x-2)^2+3x(x-5)-(2x-1)(2x+1)=-14
2x² - 8x + 8 = x² - 9 - 8x + x² + 3
2x² - 2x² - 8x + 8x = -6 - 8
0 ≠ -14
równanie sprzeczne
x² - 4x +4 + 3x²- 15 - 4x² + 1 = -14
4x² - 4x² - 4x = -14 + 11
-4x = -3 /:(-4)
x = 3/4
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1) 2(x-2)^2=(x-3)(x+3)-(8x-x^2-3)
2x² - 8x + 8 = x² - 9 - 8x + x² + 3
2x² - 2x² - 8x + 8x = -6 - 8
0 ≠ -14
równanie sprzeczne
2) (x-2)^2+3x(x-5)-(2x-1)(2x+1)=-14
x² - 4x +4 + 3x²- 15 - 4x² + 1 = -14
4x² - 4x² - 4x = -14 + 11
-4x = -3 /:(-4)
x = 3/4