Question

If y=-1 is a zero of the polynomial q (y) = 4y3 + kyz - y -1, then find the value of k.
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Answer 1

Step-by-step explanation:

4y³ + ky² - y - 1 = 0

4(-1)³ + k(-1)² - (-1) - 1 = 0

4×(-1) + k×(1) + 1 - 1 = 0

- 4 + k = 0

k = 4