bonsoir
( 2 x + 3 ) / 4 = ( - x + 7 ) / 5
10 x + 15 = - 4 x + 28
10 x + 4 x = 28 - 15
14 x = 13
x = 13/14
x² = ( 5 - x ) ( 3 - x )
x² = 15 - 5 x - 3 x + x²
x² - x² + 5 x + 3 x = 15
8 x = 15
x = 15/8
( 2 x + 1 ) / ( x + 2 ) = quoi ?
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bonsoir
( 2 x + 3 ) / 4 = ( - x + 7 ) / 5
10 x + 15 = - 4 x + 28
10 x + 4 x = 28 - 15
14 x = 13
x = 13/14
x² = ( 5 - x ) ( 3 - x )
x² = 15 - 5 x - 3 x + x²
x² - x² + 5 x + 3 x = 15
8 x = 15
x = 15/8
( 2 x + 1 ) / ( x + 2 ) = quoi ?