Please help me idk this

Hey free points ! people i have a few math questions on my profile consider looking at them i have to get done in 30 mins!

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

Find the power set of each of these sets, where a and b are distinct elements. a) {a} b) {a, b} c) {1, 2, 3, 4} show steps