Sergey is solving 5 x squared plus 20 x minus 7 is equal to 0 Which steps could he use to solve the quadratic equation by completing the square? Choose three correct answers.
Answer
A
x plus 2 is equal to plus or minus square root of 27 fifths
B
5 times open paren x squared plus 4 x plus 4 close paren is equal to 7 plus 20
C
5 times open paren x squared plus 4 x close paren is equal to negative 7
D
5 times open paren x squared plus 4 x plus 4 close paren is equal to negative 7 plus 20
E
5 times open paren x squared plus 4 x close paren is equal to 7