Write 5x²-20x-1=0 in vertex form. the answer in the text book is 5(x-2)²-21=0
I really would appreciate it, my pre calculus teacher isn't teaching us alot of the questions he assigned to us.​

What are the sotions to the quadratic equation 9x^2=4

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Jalen charges $25.50 for every 3 hours of yard work he does for his neighbors. ralph charges $34 for every 4 hours of work that he does. who charges less? opinions: 1.they charge the same amount 2.jalen 3.ralph