Question

if 2 is a zero of polynomial p(x) =5x² + 3x - 4k, then the value of k​

Answer 1

Answer:

The value of k is 13/2

Step-by-step explanation:

putting 2 on the place of x

we get ,

5(2)^2 + 3(2)-4k=0

5×4 +6 -4k = 0

26-4k= 0

26=4k

k=26/4

k=13/2

hence the value of k is 13/2

Answer 2

Answer:

⇒ the value of k = 12

Step-by-step explanation:

Given polynomial  P(x) = 5x² + 3x - 4k  

And 2 is the zero of the P(x)

⇒ Zero of the polynomial is a value which gives zero on substituting in x place

⇒ if 2 is zero of P(x) then  P(2) will be equals to 0

 P(2) ⇒ 5(2)² + 3(2) -4k = 0

        ⇒ 5(10) + 6 - 4k  = 0

        ⇒  48 - 4k = 0

        ⇒ - 4k = - 48  

        ⇒  4 k = 48

        ⇒  k = 12    

⇒ the value of k = 12