Sagot :
bonjour
E = 3(x+3)+4(x-2) = 3 x + 9 + 4x - 8 = 7 x + 1
E = 5(x*2-4)-3(3x+7)+4x2-6x
E = 5 x² - 20 - 9 x - 21 + 4 x² - 6 x = 9 x² - 15 x - 41
E = (x+4)(x-2) = x² - 2 x + 4 x - 8 = x² + 2 x - 8
E = (2x+3)(5x-3) = 10 x² - 6 x + 15 x - 9 = 10 x² + 9 x - 9
E =(x-3)*2 = x² - 6 x + 9
Bonjour
Développe et réduis, lorsque c'est possible, les expressions suivantes.
E = 3(x+3)+4(x-2)
= 3x + 9 + 4x - 8
= 7x + 1
E = 5(x*2-4)-3(3x+7)+4x2-6x
= 5x² - 4x - 9x - 21 + 4x² - 6x
= 5x² + 4x² - 4x - 9x - 6x - 2
= 9x² - 19x - 2
E = (x+4)(x-2) = x² - 2x + 4x - 8 = x² + 2x - 8
E = (2x+3)(5x-3) = 10x² - 6x + 15x - 9 = 10x² + 9x - 9
E =(x-3)*2 = x² - 6x + 9