find the value of k if x=4 is the solution of the equation 3x2 +kx +2=0
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3x2 + kx + 2 = 0
3(4)2 + k(4) + 2 = 0
48 + 4k + 2 = 0
50 + 4k = 0
4k = 50
k = 50÷4
k = 12.5
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