Home » Aptitude » Algebra » Question
  1. When f(x) = 12x3 – 13x2 – 5x + 7 is divided by (3x + 2), then the remainder is
    1. 2
    2. 0
    3. –1
    4. 1
Correct Option: D

By remainder theorem,

Remainder = f
-2
3

∵ f(x) = 12x3 – 13x2 – 5x + 7
∴ f
-2
= 12
-2
3 - 13
-2
2 - 5
-2
+ 7
3333

Remainder = -
12 × 8
-
13 × 4
+
10
+ 7
2793

Remainder = -
32
-
52
+
10
+ 7
993

Remainder =
-32 - 52 + 30 + 63
=
9
= 1
99

Second Method :



Your comments will be displayed only after manual approval.