Question

explain how you would use the quadratic formula to solve x^2 + 8x = –2. Why is the quadratic formula the best method to use?

Answer 1

You can rearrange the equation \[x ^{2}+8x-2=0\]

Answer 2

and the quadratic formula is \[x=\left( -b \pm \sqrt{b ^{2}-4ac}\over 2a \right)\]where \[ax ^{2}+bx+c=0\]

Answer 3

The quadratic formula is best to use because it always works and most quadratic equations are not factorable.