Question

1.Solve the quadratic equation x^(2) + 12x + 20 = 0 by completing the square.
2.Use the quadratic formula to solve 5x2 − 2x − 3 = 0

Answer 1

For the first \[\{x= -10\},\{x= -2\}\} \]

For the second

\[\left\{\left\{x= -\frac{3}{5}\right\},\{x= 1\}\right\} \]

Answer 2

2.

2 + square root of -54/10
and
2- square root of -54/10

That's what i got at least :)

Answer 3

2. http://mathway.com/math_image.aspx?p=xSMB011,-SMB02FSMB033SMB105SMB02fSMB03?p=62?p=42

Answer 4

1. x=-2,-10