Question

find the value of k if 4x³-2kx+5 leaves remainder -10 when divided by 2x+1​

Answer 1

Step-by-step explanation:

4x³ - 2kx +5

2x + 1 = 0

2x = -1

x = -1/2

4 (-1/2)³- 2k(-1/2) +5 = -10

-1/2 +k +5 = - 10

k = -10-5+1/2

k = -15 + 1/2

k = (-30 +1 )/2

k = -29 /2