bonjour
f (x) = x² + 3 x
f ( - 1 ) = ( - 1 )² + 3 *- 1 = 1 - 3 = - 2
f ( - 0.5 ) = ( - 0.5 )² +3 * - 0.5 = 0.25 - 1.5 = - 1.25
f ( 0 ) = 0
f ( 0.5 ) = 0.5 ² + 3 *0.5 = 0.25 + 1.5 = 1. 75
f ( 1 ) = 1 ² + 3 = 4
f ( 1.5 ) = 1.5 ² + 3 *1.5 = 2.25 + 4.5 = 6.75
h (x) = - 3 x + 4
- 3 x + 4 = - 2
- 3 x = - 2 - 4
- 3 x = - 6
x = 2
h (2 ) = - 2
