5. For what value of k , if 3 is a zero of
polynomial . 2x² + x +k?
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Answered by
2
Answer:
Hello mate,
Answered by
2
Hey mate!!
Here's your answer...
The polynomial is :
2x² + x + k
3 is zero of polynomial for some value of k, then
2x² + x + k = 0
2(3)² + 3 + k = 0 (Putting x = 3)
2*9 + 3 + k = 0
18 + 3 + k = 0
21 + k = 0
k = -21
Therefore,
k = -21, 3 is a zero of the polynomial.
Hope it helped you....
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