Question

find the remainder when x cube + 3 X square + 3 X + 1 is divided by question is 5 + 2 x class 9​

Answer 1

Answer:Apply remainder theorem

=>5+2x =0

=> 2x = - 5

=> x = - 5/2

Replace x by – 5/2 we get

=>x3+3x2 + 3x + 1

=>(-5/2)3 + 3(-5/2)2 + 3(-5/2) + 1

=> -125/8  + 75/4 – 15/2 + 1

Add the fraction taking LCM of denominator

=>(-125 + 150  - 60 + 8 )/125

=> -27/8

Remainder is -27/8