Question

In the function f(x) = 4(x2 − 6x + ____) + 20, what number belongs in the blank to complete the square?

Answer 1

So to complete the square you take half the coefficient of the 'x' which is 6...so 3...then square it....so 9....and add it to both sides...

So this is 9 :)

Answer 2

half the coefficient of x and then square it

Answer 3

Thanks for the help and thanks helder for how to get it next time. :D