Bonjour

D = x² -3x +2            pour x = -2

(-2)^2 -3(-2) + 2

4 + 6 + 2

12

E = (7 -x) (x-6)           pour x = 3

(7-3)(3-6)

(4)(-3)

-12

F = (3x -7)(5 -x)        pour x = -1

(3*-1  -7) (5 -(-1))

(-3-7)(5+1)

(-10)(6)

-60

Verified answer

Bonjour,

D = x² -3x +2            pour x = -2

-2² -3 X -2 +2 = +4 +6 +2 = 12

E = (7 -x) (x-6)           pour x = 3

(7 -3)(3 -6) = 4 X-3 = -12

F = (3x -7)(5 -x)        pour x = -1

(3 X -1 -7) ( 5 - -1) = (-3 -7) ( 5 +1) = -10 X 6 = -60