Which of the following is a solution of x2 + 2x + 8?

A solution of a quadratic equation (ax^2+bx+c) is the point at which the parabola crosses the x-axis. We can find this by using the Quadratic formula, which is . We can solve the equation as follows:


Then we separate the negative from -28 to get:

Then we continue to solve by factoring common terms (-2 and 2). We get the solutions of . Choice B matches our first solution.

:)

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Is there a picture of a graph or whatever that goes along with this?