if -2 is a root of quadratic equation 3x²-kx+5=0. find the value of k.
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it is given that -2 is a root of quadratic equation 3x² - kx + 5 = 0
3(-2)² - k(-2) + 5 = 0
3(4) +2k + 5 =0
12 +2k = -5
2k = -5 - 12
2k = -18
k = -9
Step-by-step explanation:
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