6x squared minus 58x plus 80 equals 0?

Answer 1

6x2 + 58x + 80 = 0
2(40 + 29x + 3x2) = 0
2((8 + x)(5 + 3x)) = 0, ignore 2

8 + x = 0 => x = -8
5 + 3x = 0 => 3x = 5 => x= 1.666666....

x = {-8, 1.66....}