Question

one of the roots of the quadratic equation x²- 10x +K equal to zero is 8 and the value of K is
a.-8
b.8
c -16
d.16​

Answer 1

${x}^{2} - 10x + k = 0 \\ {8}^{2} - 10(8) + k = 0 \\ 64 - 80 + k = 0 \\ k = - 16$