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1.If x = 3 is one root of the quadratic equationr? - 2kx - 6= 0, then find the value of k. [1]

Answer»

x^2-2kx-6 ; x=3; (3)^2-2k(3)-6=9-6k-6=3-6k; 3=6k; k=3/6=1/2



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