Question

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

Answer 1

when you replace x with 8 you get an answer of 1961, however if you solve the equation in quadratic form and don't replace x you get 14 +/- i $14 \frac{+}{-} i\sqrt{14429}$ divided by 25