YA Find an equation in vertex form for the parabola with focus(1, 4) and
directrix x = 5. Show your work or explain your reasoning.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

8-2x+3x2=6 and six is your answer