2n^2 - 20 n= 5 ?????
2n^2-20=02n^2=20n^2=20÷2n^2=10n=radical 10
Use this:n1,2 = -b +- √b²-4ac / 2aa = 2n (2)b = -20c = -5 (you have to subtract 5 to get 0)
