use the quadratic formula.

If , we must have:

this of course, only has real solutions when we are withing the domain of the square root. thus we require . what is the range of -values for which this happens?

the quadratic formula can work, but it is overkill. this equation can be factored.and also how to solve the equation 4x^2+20x+25=0 i tried to use the formula but i didnt get a answer that worked... thnx

So, .

now continue