Question

2. If one zero of the quadratic
polynomial x^2+3x+k is 2, then
the value of k is *
O:
8
O O O
O 10
-10
O 8​

Answer 1

${ \huge{ \underline{ \underline{ \sf{ \green{GivEn : }}}}}}$

• f(x) = x² + 3x + k

• One zero = 2

${ \huge{ \underline{ \underline{ \sf{ \green{To \: find :}}}}}}$

• Value of K

${ \huge{ \underline{ \underline{ \sf{ \green{SoluTion : }}}}}}$

Given that,

One zero = 2

Now, put x = 2 in the given polynomial.

f(x) = x² + 3x + k

⟶ 2² + 3×2 + k =0

⟶ 4 + 6 + k = 0

⟶ 10 + k = 0

⟶ k = -10

Hence, value of k is = -10