Yes that's correct, but there's a much faster way that doesn't involve using a calculator. Square the first equation:
And since , we have
. The desired expression is equal to 28.
the Given K^2-3K+5 = 0
determine the value of K^4-6K^3+9K^2-7.
if i were to solve this ... i will use the quadratic formula to solve the K. and if the value of K is solve then i will plug in to the expression K^4-6K^3+9K^2-7. Am i doing it right? if not please Guide me on this ...
Thank you and God Bless