Which equation is y is equal to 2 x squared minus 8 x plus 9 rewritten in vertex form?
A
y is equal to 2 times open paren x minus 2 close paren squared plus 5B
y is equal to 2 times open paren x minus 2 close paren squared plus 9C
y is equal to 2 times open paren x minus 2 close paren squared plus 17D
y is equal to 2 times open paren x minus 2 close paren squared plus 1