Question

The remainder when f(x) = xcube - 2x² + 3x + 1 is divide by 2x+1​

Answer 1

Answer:

- 2x ^2+ 3x + 1 ÷ 2x + 1

combine 3x and 1/2 x to get 7/2

- 2 x ^2 + 7/2 x + 1

Answer 2

Answer:

by remainder therom,

2x +1 = 0

=> x = -1/2

so, 2(-1/2)³ + 3(-1/2) +1

=> 2(-1/8) +3(-1/2) + 1

=> -1/4 -3/2 +1

=> -1-6/4 +1

=> -7/4 +1

=> -7+1/4 = -6/4 = -3/2

hence -3/2 is the remainder...