Expand the factor in the brackets
y = 5/8* (x^2 - 25x + 25) - 6
Multiply through by 5/8
y = 5/8 x^2 - (5/8)*25x + 5/8 * 25 - 6 Change the 6 to 8ths
y = 5/8x^2 - (5/8)*25x + 125/8 - 48/8 Combine the 2 fractions at the end.
y = (5/8)x^2 - 5/8*25x + 77/8 Multiply 5/8 * 25
y = (5/8)x^2 - (125/8)*x + 77/8
There are all kinds of possible answers. If you have been given a list, please post it and I will alter my answer accordingly.
