SOLUTION: I need to a step by step solving this equation:0= x^2+15x-1350 , This is from a word problem using quadratic equation solving cost per person.... I know the answer but I do not kno

Question 240797: I need to a step by step solving this equation:0= x^2+15x-1350 , This is from a word problem using quadratic equation solving cost per person.... I know the answer but I do not know how they got it....help please
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
If you 'see' an easy factorization, you can always use that. But for me, once the factors get that large, I prefer the quadratic equation. here is a solver that does it for you --> http://www.algebra.com/algebra/homework/quadratic/quadratic.solver

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=5625 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 30, -45. Here's your graph:

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