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2x² + 3x - 27 = 0
2x + 9
x - 3
9x - 6x = 3x
(2x + 9)(x -2) = 0
2x - 9 = 0 x - 2 = 0
2x = - 9 x = 2
x = - 9/2
CS = ( -9/2 ; 2)
4x² + 7x - 2 = 0
4x - 1
x +2
8x - x = 7x
(4x - 1)(x + 2) = 0
4x - 1 = 0 x + 2 = 0
4x = 1 x = -2
x = 1/4
CS = (-2 ; 1/4)
x² - 5x + 6 = 0
x - 6
x +1
-6x + x = -5x
(x - 6)(x + 1) = 0
x - 6 = 0 x + 1 = 0
x = 6 x = -1
CS = (-1 ; 6)
2x² - 7x + 3 = 0
2x - 1
x - 3
-6x - x = - 7x
(2x - 1)(x - 3) = 0
2x - 1 = 0 x - 3 = 0
2x = 1 x = 3
x = 1/2
CS = (1/2 ; 3)
Eternamente axllxa
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