Question

If one roots of the quadratic equation x-11x+k=0 is 9 find the value of k

Answer 1

x^2-11x+k=0

one root is 9

so

(9)^2-11 (9)+k=0

81-99+k=0

k=18

so your answer is 18

Answer 2

here's your answer,
x=9,
x-11x+k=0,
9-(11*9)+k=0,
k= 90
hope it helps you....!