Question

If (2x - 3) is a factor of 2x4 -3x2 + 15x - 15k, find
the value of (3k - 15k).
[CBSE 2017]​

Answer 1

Step-by-step explanation:

x= 3/2

2(3/2)4 - 3(3/2) + 15(3/2) = 15k

12 - 4.5 + 22.5 = 15k

12 + 18 = 15k

30 = 15k

30/15 = k

2 =k