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Question
If –2 is a zero of the polynomial 3x2 + 4x + 2k, then find the value of k.
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Solution
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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