Objective: Solve quadratic equations using the principle of square roots.
The Principle of Square Roots states that if x2 = k, then x must be equal to the positive or negative square root of k. This principle is useful for solving quadratic equations which cannot be solved by factoring and applying the principle of zero products. Before using the principle of square roots, the equation must be written in such a way that the side containing the variable is a perfect square.
Watch the video below to see some examples of this process of solving quadratic equations.
Complete the worksheet attachment below and then check your answers using the solutions attachment. Once you have completed these exercises, click the link to advance to the next lesson.