Question

x=3/2 is a root of quadratic equation kx²+5x-21=0 then complete the following activity to find the value of k?​

Answer 1

Answer:

x=3/2

$kx^{2}$ + 5x - 21

∴ k (3/2)² + 5 (3/2) - 21 = 0

∴ 9/4k + 15/2 - 21 = 0

∴ (9k + 30 - 84)/4 = 0

9k + 30 - 84 = 0

9k = 84 - 30

k = 54/9

k = 6

hope it will help u

by

akshat paliwal

Step-by-step explanation: