lf x=1/2 is a 2 of the polynomial 2x²+kx-12,then find the value of k
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f(x) = 2x^2 +kx-12
f(1/2) = 2(1/4) +k/2 -12 =0
1/2 +k/2 -12 =0
1+k+-24/2 = 0
1+k-24 = 0
k =24 -1
k =23.
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