Question

How do you write `y = x^2 - 9x - 10` into vertex form?

Answer 1

`(y+121/4)=(x-9/2)^2`

Explanation:

`" "y=x^2-9x-10`

`" "y=x^2-2*9/2x+81/4-121/4`

`" "y+121/4=x^2-2*9/2x+81/4`

`" "(y+121/4)=(x-9/2)^2`