Odpowiedź:
a) - 7 x² + 42 x = 0
- 7 x*( x - 6 ) = 0
x = 0 lub x - 6 = 0
x = 0 lub x = 6
=================
b) 9 x² + x = 0
x*( 9 x +
x = 0 lub 9 x + = 0
x = 0 lub 9 x = -
x = 0 lub x = - : 9
x = 0 lub x = -
======================
c) 36 x² = 6 x
36 x² - 6 x = 0
6 x*( 6 x - 1) = 0
x = 0 lub 6 x - 1 = 0
x = 0 lub 6 x = 1
x = 0 lub x =
================
d) 2 x + 18 x² = 0
2 x*( 1 + 9 x) = 0
x = 0 lub 1 + 9 x = 0
x = 0 lub 9 x = - 1
x = 0 lob x = -
==================
e)
x² - √8 x = 0 / : √2
x²- 2 x = 0
x*( x - 2) = 0
x = 0 lub x = 2
f ) x = - 3 x²
3 x² + √3 x = 0
x*(3 x + √3 ) = 0
x = 0 lub 3 x + √3 = 0
x = 0 lub 3 x = - √3
====================
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Odpowiedź:
a) - 7 x² + 42 x = 0
- 7 x*( x - 6 ) = 0
x = 0 lub x - 6 = 0
x = 0 lub x = 6
=================
b) 9 x² + x = 0
x*( 9 x +
x = 0 lub 9 x + = 0
x = 0 lub 9 x = -
x = 0 lub x = - : 9
x = 0 lub x = -
======================
c) 36 x² = 6 x
36 x² - 6 x = 0
6 x*( 6 x - 1) = 0
x = 0 lub 6 x - 1 = 0
x = 0 lub 6 x = 1
x = 0 lub x =
================
d) 2 x + 18 x² = 0
2 x*( 1 + 9 x) = 0
x = 0 lub 1 + 9 x = 0
x = 0 lub 9 x = - 1
x = 0 lob x = -
==================
e)
x² - √8 x = 0 / : √2
x²- 2 x = 0
x*( x - 2) = 0
x = 0 lub x = 2
=================
f ) x = - 3 x²
3 x² + √3 x = 0
x*(3 x + √3 ) = 0
x = 0 lub 3 x + √3 = 0
x = 0 lub 3 x = - √3
x = 0 lub x = -
====================
Szczegółowe wyjaśnienie: