Question

answer the following if one zero of quadratic polynomial x square+3x+k is 2,then fid the value of k.​

Answer 1

Answer:

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Answer 2

Given :-

• Quadratic polynomial ; x² + 3x + k.
• One zero of quadratic polynomial is 2.

To Find :-

• Value of k.

Solution :-

Let the given quadratic polynomial be ;

⭐ f(x) = x² + 3x + k

Given, One zero of quadratic polynomial is 2.

⭐ f(2) = 0

Put x = 2 in f(x) , We get ;

$\implies$ f(2) = 2² + 3(2) + k

[ °.° f(2) = 0 ]

$\implies$ 0 = 4 + 6 + k

$\implies$ 0 = 10 + k

$\implies$ k = -10 $\red\bigstar$

Hence,

• The value of k is -10.