How do you find the axis of symmetry for f(x)=2 squared-6x+15 and how did you solve it

What is the size of the matrix resulting from

The function show two sisters' savings account and the rate at which they plan to deposit money

Louis wants to carpet the rectangular floor of his basement the basement has an area of 864 square feet the width of the basement is 2/3 its length what is the length of lewis's basement