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Perfect Square
CONCEPTS
Perfect Squares
• x² + 2Ax + A² = (x + A)² = 0
PRACTICE PROBLEMS
Question 1 Consider the equation x² - 6x + k = 0. For what value of k is there 1 real solution?
-- Answer -- -3
x² + 2Ax + A² = (x + A)²
x² + 2 * (-3)x + (-3)² = 0 => k = -3
ACT PRACTICE PROBLEMS