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ćw2
8x=1/2x^2
zad.1.
a)-7x^2+42x=0
b)9x^2+1/3x=0
c)36x^2=6x
d)2x+18x^2=0
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ćw2
8x=1/2x^2 /*2
16x = x²
16x - x² = 0
x(16 - x) = 0
x = 0 lub 16 - x = 0
x = 16
zad.1.
a)
-7x²+42x=0
-7x(x - 6) = 0
-7x = 0 lub x - 6 = 0
x = 0 x = 6
b)
9x²+1/3x=0 /*3
27x² + x = 0
x(27x + 1) = 0
x = 0 lub 27x + 1 = 0
27x = -1
x = -1/27
c)
36x²=6x
36x² - 6x = 0
6x(6x - 1) = 0
6x = 0 lub 6x - 1 = 0
x = 0 6x = 1
x = 1/6
d)
2x+18x²=0
2x(1 + 9x) = 0
2x = 0 lub 1 + 9x = 0
x = 0 9x = -1
x = -1/9