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