bonjour
f(x) = 2 x² - 3 x + 4
f ( - 2 ) = 2 ( - 2 )² - 3 ( - 2) + 4 = 8 + 6 + 4 = 18
f( 0) = 4
f ( 5 ) = 2 *25 - 3*5 + 4 = 50 - 15 + 4 = 39
f( 1/3) = 2 * 1/9 - 3 *1/3 + 4 = 2/9 - 1 + 4 = 2/9 - 9/9 + 36/9 = 29/9
2 x² - 3 x + 4 = 4
2 x² - 3 x = 0
x ( 2 x - 3 ) = 0
x =0 ou 3/2
