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Simplifying -5x2 + 9x = 10 Reorder the terms: 9x + -5x2 = 10 Solving 9x + -5x2 = 10 Solving for variable 'x'. Reorder the terms: -10 + 9x + -5x2 = 10 + -10 Combine like terms: 10 + -10 = 0 -10 + 9x + -5x2 = 0 Begin completing the square. Divide all terms by -5 the coefficient of the squared term: Divide each side by '-5'. 2 + -1.8x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + -1.8x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + -1.8x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1.8x + x2 = 0 + -2 -1.8x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 -1.8x + x2 = -2 The x term is -1.8x. Take half its coefficient (-0.9). Square it (0.81) and add it to both sides. Add '0.81' to each side of the equation. -1.8x + 0.81 + x2 = -2 + 0.81 Reorder the terms: 0.81 + -1.8x + x2 = -2 + 0.81 Combine like terms: -2 + 0.81 = -1.19 0.81 + -1.8x + x2 = -1.19 Factor a perfect square on the left side: (x + -0.9)(x + -0.9) = -1.19 Can't calculate square root of the right side. The solution to this equation could not be determined.
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