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Byju's Answer
Standard X
Mathematics
Arithmetic Mean
Let px=3 x3+4...
Question
Let p(x) = 3x
3
+ 4x
2
− 5x + 8. Find p(−2).
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Solution
Let:
p
x
=
3
x
3
+
4
x
2
-
5
x
+
8
Thus, we have:
p
-
2
=
3
×
-
2
3
+
4
×
-
2
2
-
5
×
-
2
+
8
=
3
×
-
8
+
4
×
4
+
10
+
8
=
-
24
+
16
+
10
+
8
=
10
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0
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