Pour y = -7
A= (-7 +1) (3-5x(-7) )
= -6 ( 3+35)
-6 x 38
= -228
POur y = 5/3
A = (5/3 +1 ) (3-5x5/3)
= (5/3+3/3 ) (3- 25/3 )
= 8/3 x ( 9/3 - 25/3 )
= 8/3 x -16/ 3
-128 / 9
Pour y=1,5
A= (1,5+1) ( 3-5x1,5)
=2,5(3-7,5)
= 2,5 x -4,5
= -11,25