Max pkt tylko za pełne i prawidłowe rozwiązanie zadania :
Równania wielomianowe :
a)
b)
c)
--------------------------------------------------------------------
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a)
10x^4 + x^3 = 2x^2
10x^4 + x^3 - 2x^2 = 0
x²(10x² + x - 2) = 0
x² = 0 l ub 10x² + x - 2 = 0
x = 0 Δ = 1 + 80 = 81
√Δ = 9
x1 = (-1 - 9) / 20 = -10/20 = -1/2
x2 = (-1 + 9)/20 = 8/20 = 2/5
odp. x = 0 lub x = -1/2 lub x = 2/5
b)
to nie jest równanie wielomianowe, no chyba ze tam powinno byc tak:
x^4 - 4x^3 = 5x^2
x^4 - 4x^3 - 5x^2 = 0
x²(x² - 4x - 5) = 0
x² = 0 lub x² - 4x - 5 = 0
x = 0 Δ = 16 + 20 = 36
√Δ = 6
x1 = (4 - 6)/2 = -2/2 = -1
x2 = (4 + 6)/2 = 10/2 = 5
odp. x = 0 lub x = -1 lub x = 5
c)
to nie jest równanie wielomianowe, no chyba ze tam powinno byc tak:
2x^5 - 2x^4 = 12x^3
2x^5 - 2x^4 - 12x^3 = 0
2x³(x² - x - 6) = 0
x³ = 0 lub x² - x - 6 = 0
x = 0 Δ = 1 + 24 = 25
√Δ = 5
x1 = (1 - 5)/2 = -4/2 = -2
x2 = (1 + 5)/2 = 6/2 = 3
odp. x = 0 lub x = -2 lub x = 3