Question

if x=3/2 is root of the quadratic equation kx2+5x-21=0 ,then find the k​

Answer 1

I hope you understand this answer

Answer 2

Answer:

k=6

Step-by-step explanation:

x=3/2

p(x)=$kx^2+5x-21=0$

Substitution x value in the equation

p(3/2)=$k(3/2)^2+5(3/2)-21=0$

p(3/2)=k(9/4)+15/2-21=0

         =9k/4+15/2-21=0

         =(9k+30-84)/4=0

         =9k+30-84=0

         =9k-54

         9k=54

         k=54/9

k=6

Thank You..........