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Question
If one zero of the quadratic polynomial kx2 + 3x + k is 2, then find the value of k.
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Solution
Given: x = 2 is one zero of the quadratic polynomial kx2 + 3x + k
Therefore, it will satisfy the above polynomial.
Now, we have
k(2)2 + 3(2) + k = 0
⇒ 4k + 6 + k = 0
⇒ 5k + 6 = 0
⇒ k = `-6/5`
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