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Simplifying 5x2 + -16x = -25 Reorder the terms: -16x + 5x2 = -25 Solving -16x + 5x2 = -25 Solving for variable 'x'. Reorder the terms: 25 + -16x + 5x2 = -25 + 25 Combine like terms: -25 + 25 = 0 25 + -16x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 5 + -3.2x + x2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + -3.2x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + -3.2x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -3.2x + x2 = 0 + -5 -3.2x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 -3.2x + x2 = -5 The x term is -3.2x. Take half its coefficient (-1.6). Square it (2.56) and add it to both sides. Add '2.56' to each side of the equation. -3.2x + 2.56 + x2 = -5 + 2.56 Reorder the terms: 2.56 + -3.2x + x2 = -5 + 2.56 Combine like terms: -5 + 2.56 = -2.44 2.56 + -3.2x + x2 = -2.44 Factor a perfect square on the left side: (x + -1.6)(x + -1.6) = -2.44 Can't calculate square root of the right side. The solution to this equation could not be determined.
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