Sagot :
E = (3x-1)(3x-1)-(2x+1)2
E= (9x²+3x-3x-1)-4x+2
E = 9x²-4x+1
E(0) = 9*0² - 4*0 +1
= 1
E(1/3) = 9*(1/3)² - 4*(1/3) +1
= 9 * (1/9) - (4/3) + 1
= (3/3) - (4/3) + (3/3)
= (2/3)
e= 3x*3x+3x*1-1*3x-1*1-4x²-4x-1
9x²+3x-3x-1-4x²-4x-1
5x²-4x-2
ensuite pour x=0
5*(0)²-4*0-2
-2
pour x=1/3
tu remplaces pareil mais pas 1/3