bonjour
A = x² + 2 x + 3 x + 6
= x² + 5 x + 6
B = - 10 x² + 15 x + 2 x - 3
= - 10 x² + 17 x - 3
C = - 5 x² + 2 x + 15 x - 6
= - 5 x² + 17 x - 6
D = 3 x - x² - 10 - 20 x
= - x² - 17 x - 10
Bonjour,
A = (x+3)(x+2)
= x^2 + 2x + 3x + 6
= 5x + x^2 + 6
B= ( 5x - 1)(-2x+3)
= 5x * -2x + 5x * 3 + -1 * -2 + -1 * 3
= -10x + 15x + 2 + -3
= 5x + -1
C= (-x+3) (5x-2)
= -x*5 + -x*-2 + 3*5 + 3* -2
= -5x + 2x + 15 + -6
= -3x + 9
D= x( 3 - x)-5(2 + 4x)
= x*3 - x*-x - 5*2 + 5*4x
= 3x - -x^2 - 10 + 20x
= 3x+ 20x + x^2 - 10
= 23x + x^2 - 10
J'espére t'avoir aidé (ée), prends soin de toi!
