Répondre :

1) f(5)= 125 - 25 + 72x5 +37 =
250- 525 + 360 + 37 = -275 + 360 +37= 122 2)f’(x)= 6x au carré -42x +72 . 3) photo 4) 2
)
f(−2) :
f
(

2
)
=
2
(

2
)
3

21
(

2
)
2
+
72
(

2
)
+
37
f(−2)=2(−2)
3
−21(−2)
2
+72(−2)+37
=
2
(

8
)

21
(
4
)

144
+
37
=2(−8)−21(4)−144+37
=

16

84

144
+
37
=−16−84−144+37
=

207
=−207
Donc,
f
(

2
)
=

207
f(−2)=−207.

f

(

2
)
f

(−2) :
f

(

2
)
=
6
(

2
)
2

42
(

2
)
+
72
f

(−2)=6(−2)
2
−42(−2)+72
=
6
(
4
)
+
84
+
72
=6(4)+84+72
=
24
+84+72=24+84+72
=180

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