Question

find remainder when x cube + 3 X square + 3 X + 1 divided by 5 + 2 x​

Answer 1

Explanation:

2x + 5 = 0

2x = -5

x = -5/2

The remainder is -

(-5/2)³ + 3(-5/2)² + 3(-5/2) + 1

-125/8 + 3(25/4) - 15/2 + 1

-125/8 + 75/4 - 15/2 + 1

-125/8 + 150/8 - 60/8 + 8/8

(-125+150-60+8)/8

(158-185)/8

-27/8