Sagot :
bonjour
A = 4 + 5 x - 15 = 5 x - 11
B = 2 x² + 2 x - x = 2 x² + x
C = - ( 16 - 8 x + x² ) = - 16 + 8 x - x²
D = 15 x² + 4
E = comprends pas 3 x = x*2 + 3 *4 = ?
Bonjour.
[tex]4 + (x - 3)5 = 4 + 5x - 15 = 5x - 11[/tex]
[tex]2x(x + 1) - x = 2 {x + 2x}^{2} - x = \\ 2 {x}^{2} + x = x(2x + 1)[/tex]
[tex] - (4 - x)2 = - (8 - 2x) = - 8 + 2x [/tex]
[tex]3(5x \times 2) + 4= 3(10x) = 30x + 4[/tex]