bonjour
A = 6 x² - 4 x - x + 7
A = 6 x² - 5 x + 7
B = 6 x + 4 + 3 x - 7
B = 9 x - 3
C = 2 x - 8 + 3 x - 9
C = 5 x - 17
Bonjour,
A = 2x(3x-2)-(x-7) = 2x*3x-2x*2-x+7
= 6x²-5x+7
B = (6x+4)+(3x-7) = 6x+3x+4-7 = 9x-3
C = (2x-8)-(-3x+9) = 2x+3x-8-9 = 5x-17
