# How do you solve #4x^2+40x+280=0# by completing the square?

##### 1 Answer

Jul 2, 2017

#### Answer:

You can't, unless you want to have complex numbers. If you want complex numbers, then the answer would be

#### Explanation:

You can simplify the quadratic to make completing the square easier:

Completing the square:

We cannot continue here, since there is no way for the above equation to be true.

However, if you want to have complex numbers, we can continue: