Question

the value of k for which 3 is a root of the equation kx squared-7x+3=0 is

Answer 1

${kx}^{2} - 7x + 3 = 0 \\ k {(3)}^{2} - 7(3) + 3 = 0 \\ 9k - 21 + 3 = 0 \\ 9k - 18 = 0 \\ 9k = 18 \\ k = \frac{18}{9} \\ k = 2$
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