If using the method of completing the square to solve the quadratic equation x^2 - 13x – 7= 0, which number would have to be added to "complete the
square"?
-

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

answer is because 4×10=40

and 98×4= is 392

40,392

2 over 5 and 4 over 15

don’t know last one sorry

step-by-step explanation:

step by step explanation: when u removing the parentheses and combined them that would be : x+3y-x-y=2y