Find the value of k for which 3 is a zero of the polynomial x^2 -kx + 12.
Answers
Answered by
1
Answer:
k =7
Step-by-step explanation:
first you have to replace xby 3 because 3 is a zero of the given polynomial
x^2 - kx +12
3^2 - k3 +12 = 0
9 - 3k + 12 = 0
21 - 3k = 0
-3k = 21
k = 21/3
k = 7
I hope it will help
pls mark brainliest
Answered by
7
If 3 is the zero of the polynomial we need to take it as x
So,
(3)² - k(3) + 12 = 0
9 - 3k + 12 = 0
12 + 9 = 3k
21 = 3k
21 ÷ 3 = k
7 = k
Therefore the value of k is 7
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