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Simplifying 5x2 + -12x + 40 = 0 Reorder the terms: 40 + -12x + 5x2 = 0 Solving 40 + -12x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 8 + -2.4x + x2 = 0 Move the constant term to the right: Add '-8' to each side of the equation. 8 + -2.4x + -8 + x2 = 0 + -8 Reorder the terms: 8 + -8 + -2.4x + x2 = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -2.4x + x2 = 0 + -8 -2.4x + x2 = 0 + -8 Combine like terms: 0 + -8 = -8 -2.4x + x2 = -8 The x term is -2.4x. Take half its coefficient (-1.2). Square it (1.44) and add it to both sides. Add '1.44' to each side of the equation. -2.4x + 1.44 + x2 = -8 + 1.44 Reorder the terms: 1.44 + -2.4x + x2 = -8 + 1.44 Combine like terms: -8 + 1.44 = -6.56 1.44 + -2.4x + x2 = -6.56 Factor a perfect square on the left side: (x + -1.2)(x + -1.2) = -6.56 Can't calculate square root of the right side. The solution to this equation could not be determined.
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