Find k if x = 2 is a root of equation kx² - 10x + 4 = 0 (A) 4 (B) 8 (C) 1/4 (D) 3
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if x=2
kx^2-10x+4= 0
k(2)^2-10(2)+4=0
4k-20+4=0. 4k=16
therefore k=4
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