CBSE Class 9 Answered
Find
the remainder when 3x3 - 4x2 + 7x - 5 is divided by (x
- 3) and (x + 3).
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
p(x) = 3x3 - 4x2 + 7x - 5
Remainder when (x - 3) divides p(x) is
= p(3) = 3 
33 -
4 32
+ 7 3 - 5
= 3 27 - 4 9 + 21 - 5 =
61
Remainder when (x + 3) divides p(x) is
= p(-3) = 3 (-3)3
- 4(-3)2 + 7 (-3) - 5
= 3 (-27) - 4 9 - 21 - 5
= -143
Therefore, the required remainders are 61 and -143.
Answered by | 04 Jun, 2014, 03:23: PM
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