Question

If one
of the zero of the quadratic polynomial x square +3x+ k is 2 , then the value of k is
​

Answer 1

Answer

k = - 10

Given

one  of the zero of the quadratic polynomial x²+3x+k is 2

To Find

Value of k

Key point

A/c to factor theorem ,

If y is zero of polynomial of p(x) , then

p(y) = 0

Solution

Given quadratic polynomial is x² + 3x + k

⇒ p(x) = x² + 3x + k

and 2 is zero of the polynomial .

⇒ p(2) = 0

⇒ (2)² + 3(2) + k = 0

⇒ 4 + 6 + k = 0

⇒ k + 10 = 0

⇒ k = - 10

So , the value of k is - 10 .

Answer 2

Answer:

Value of k is -10

hope it helps you