1.

If - 2 is a zero of the polynomial 3x2 + 4x + 2k then find the value of k.

Answer»

Given: 

x = –2 is one zero of the polynomial 3x2 + 4x + 2k 

Therefore, 

it will satisfy the above polynomial. 

Now, we have 

3(–2)2 + 4(–2)1 + 2k = 0 

⇒ 12 – 8 + 2k = 0 

⇒ k = – 2



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