Sagot :
bonsoir
f (x) = x ( x + 3 )
f (x) = x² +3 x
f ( -3) = ( - 3 )² + 3 *-3 = 9 - 9 = 0
f ( 7) = 7² + 3 *7 = 49 + 21 = 70
f ( - 4) = ( - 4 )² + 3 * - 4 = 16 - 12 = 4
bonsoir
f (x) = x ( x + 3 )
f (x) = x² +3 x
f ( -3) = ( - 3 )² + 3 *-3 = 9 - 9 = 0
f ( 7) = 7² + 3 *7 = 49 + 21 = 70
f ( - 4) = ( - 4 )² + 3 * - 4 = 16 - 12 = 4