Solve x2 - 7x = -13

Question

Solve x2 - 7x = -13

anonymous · Answer

I'm really bad at Solving Quadratic Equations w/ 0 as the leading coefficient

anonymous · Answer

$$x ^{2}-7x=-13 ?$$

anonymous · Answer

yeah sorry i forgot to include the ^

anonymous · Answer

$$x ^{2}-7x+13=0$$
you can use the general solution
$$x_{1}= \frac{ -b+\sqrt{b ^{2}-4ac} }{ 2a }$$
$$x_{2}= \frac{ -b-\sqrt{b ^{2}-4ac} }{ 2a }$$
where
a=1
b=-7
c=13

anonymous · Answer

so basically to solve these types of equations you just substitute and simplify with the quadratic formula?

anonymous · Answer

It is the general method for quadratic equations (works for all the quadratic equations .. 
but there are some equations where you could do other methods to factoring

anonymous · Answer

There is another way, which is completing the square, but doing the quadratic formula is fine.

anonymous · Answer

Thank you soon much!

anonymous · Answer

soooo*

anonymous · Answer

jaja, you're welcome :)

anonymous · Answer

Hint: The answer has imaginary numbers. :)