Question

find k if x=3 is a root of equation k x2 - 10 x +3=0​

Answer 1

Step-by-step explanation:

If x=3,

$k(3 ){}^{2} - 10(3) + 3 = 0 \\ 9k - 30 + 3 = 0 \\9k - 27 = 0 \\ 9k = 27 \\ k = 27 \div 3 = 9$