Odpowiedź:
f ) [tex]\frac{1}{2} x^{2} -2 x - 1 = 0 / * 2\\x^{2} - 4 x - 2 = 0[/tex]
Δ = (-4)² -4*1*(-2) = 16 + 8 = 24 = 4*6
√Δ = 2√6
x = [tex]\frac{4 - 2\sqrt{6} }{2*1} = 2 - \sqrt{6}[/tex] lub x = [tex]\frac{4 + 2\sqrt{6} }{2} = 2 + \sqrt{6}[/tex]
=======================================
2 x² - [tex]\frac{5}{2} x[/tex] + 1 = 0 / * 2
4 x² - 5 x + 2 = 0
Δ = (-5)² - 4*4*2 = 25 - 32 < 0 - brak rozwiązań rzeczywistych
======================================================
Szczegółowe wyjaśnienie:
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Odpowiedź:
f ) [tex]\frac{1}{2} x^{2} -2 x - 1 = 0 / * 2\\x^{2} - 4 x - 2 = 0[/tex]
Δ = (-4)² -4*1*(-2) = 16 + 8 = 24 = 4*6
√Δ = 2√6
x = [tex]\frac{4 - 2\sqrt{6} }{2*1} = 2 - \sqrt{6}[/tex] lub x = [tex]\frac{4 + 2\sqrt{6} }{2} = 2 + \sqrt{6}[/tex]
=======================================
2 x² - [tex]\frac{5}{2} x[/tex] + 1 = 0 / * 2
4 x² - 5 x + 2 = 0
Δ = (-5)² - 4*4*2 = 25 - 32 < 0 - brak rozwiązań rzeczywistych
======================================================
Szczegółowe wyjaśnienie: