Odpowiedź:
a) 16x + 32 = 0 |÷16
x + 2 = 0
x = -2
d) x² + 11 = 0
x² = - 11
sprzeczne (brak rozwiązań)
g) x⁴ - 1 = 0
x⁴ = 1
x = 1 lub x = -1
j) -x² + 6x - 5 = 0
x² - 6x + 5 = 0
x² - 2×x×3 + 3² - 4 = 0
(x-3)² - 4 = p
(x-3)² = 4
x-3 = 2 lub x-3 = -2
x = 5 lub x = 1
m) (4-x)(x+7)(5x+15) = 0
4-x = 0 lub x+7 = 0 lub 5x+15 = 0 |÷5
x = 4 lub x = -7 lub x = -3
p) (x²-9)(x²-6x) = 0
x(x-6)(x+3)(x-3) = 0
x = 0 lub x = 6 lub x = -3 lub x = 3
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Odpowiedź:
a) 16x + 32 = 0 |÷16
x + 2 = 0
x = -2
d) x² + 11 = 0
x² = - 11
sprzeczne (brak rozwiązań)
g) x⁴ - 1 = 0
x⁴ = 1
x = 1 lub x = -1
j) -x² + 6x - 5 = 0
x² - 6x + 5 = 0
x² - 2×x×3 + 3² - 4 = 0
(x-3)² - 4 = p
(x-3)² = 4
x-3 = 2 lub x-3 = -2
x = 5 lub x = 1
m) (4-x)(x+7)(5x+15) = 0
4-x = 0 lub x+7 = 0 lub 5x+15 = 0 |÷5
x = 4 lub x = -7 lub x = -3
p) (x²-9)(x²-6x) = 0
x(x-6)(x+3)(x-3) = 0
x = 0 lub x = 6 lub x = -3 lub x = 3