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4-70.

Using the technique of completing the square, solve . Homework Help ✎

See the Math Notes box in Lesson 2.1.4 for help with completing the square. Also see problem 3-117.

What steps were used to obtain this equation?

Now solve the equation.

Take the square root of both sides.

Subtract from both sides.

Simplify your answer.

Since the original equation had an -term, you should try to find 2 solutions.