if -2 is zero of the polynomial3x^2-kx +2 then value of k is
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if -2 is zero of the polynomial3x^2-kx +2 then value of k is
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Answer:
k = -7
Step-by-step explanation:
f(x) = 3x^2 - kx + 2 = 0
f(-2) = 3(-2)^2 - k(-2) + 2 = 0
3(4) + 2k + 2 = 0
12 + 2k + 2 = 0
14 + 2k = 0
2k = -14
k = -14/2
k = -7
Hope it helps you!!!