Sagot :
bonsoir,
A = 2x - 1 - x²
B = x2 + x + 7
C = 3 + 7x² - 2x
D = 1 - 9x + x²
Bonsoir,
Écrire sans parenthèses les expressions suivantes.
A = 2x - (1 + x²) = 2x-1-x² => -x²+2x-1
B = x² + (x + 7) = x²+x+7
C = 3 + (7x² - 2x) = 7x²-2x+3
D = 1 - (9x - x²)= 1-9x+x² => x²-9x+1