Inga is solving 2 x squared plus 12 x minus 3 is equal to 0 Which steps could she use to solve the quadratic equation? Choose three correct answers.
A
x plus 3 is equal to plus or minus square root of 21 halvesB
2 times open paren x squared plus 6 x close paren is equal to negative 3C
2 times open paren x squared plus 6 x close paren is equal to 3D
2 times open paren x squared plus 6 x plus 9 close paren is equal to 3 plus 18E
2 times open paren x squared plus 6 x plus 9 close paren is equal to negative 3 plus 9