bonjour
(-7x + 2)(6x - 15) = 0
x = 2/7 ou 15/6
7*(2x - 5)= 4 * (2x + 9)
14 x - 35 = 8 x + 36
14 x - 8 x = 36 + 35
6 x = 71
x = 71/6
(2x - 5)(-4x - 7) + (-4x - 7)(8x - 1) = 0
( - 4 x - 7 ) ( 2 x - 5 + 8 x - 1 ) = 0
( - 4 x - 7 ) ( 10 x - 6 ) = 0
x = - 7/4 ou 6/10 = 3 /5
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bonjour
(-7x + 2)(6x - 15) = 0
x = 2/7 ou 15/6
7*(2x - 5)= 4 * (2x + 9)
14 x - 35 = 8 x + 36
14 x - 8 x = 36 + 35
6 x = 71
x = 71/6
(2x - 5)(-4x - 7) + (-4x - 7)(8x - 1) = 0
( - 4 x - 7 ) ( 2 x - 5 + 8 x - 1 ) = 0
( - 4 x - 7 ) ( 10 x - 6 ) = 0
x = - 7/4 ou 6/10 = 3 /5