SOLUTION: Find the x-intercepts. y = x^2 + 4x

SOLUTION: Find the x-intercepts. y = x^2 + 4x - 1

Question 172246This question is from textbook Introductory Algebra
: Find the x-intercepts.
y = x^2 + 4x - 1 This question is from textbook Introductory Algebra

Answer by KnightOwlTutor(293) (Show Source): You can put this solution on YOUR website!
in order to get the x intercepts set y =0 and use the quadratic formula.

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=20 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 0.23606797749979, -4.23606797749979. Here's your graph:

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