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Advanced Math
/ Nonlinear equations in one variable and systems of equations in two variables
Difficulty: Medium
What is a solution to the given equation?
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Explanation
The correct answer is either or . Adding to each side of the given equation yields . Since a product of two factors is equal to if and only if at least one of the factors is , either or . Adding to each side of the equation yields . Subtracting from each side of the equation yields . Therefore, the solutions to the given equation are and . Note that -30 and 30 are examples of ways to enter a correct answer.