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Simplifying 4.9x2 + -9.8x + 15 = 0 Reorder the terms: 15 + -9.8x + 4.9x2 = 0 Solving 15 + -9.8x + 4.9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4.9 the coefficient of the squared term: Divide each side by '4.9'. 3.06122449 + -2x + x2 = 0 Move the constant term to the right: Add '-3.06122449' to each side of the equation. 3.06122449 + -2x + -3.06122449 + x2 = 0 + -3.06122449 Reorder the terms: 3.06122449 + -3.06122449 + -2x + x2 = 0 + -3.06122449 Combine like terms: 3.06122449 + -3.06122449 = 0.00000000 0.00000000 + -2x + x2 = 0 + -3.06122449 -2x + x2 = 0 + -3.06122449 Combine like terms: 0 + -3.06122449 = -3.06122449 -2x + x2 = -3.06122449 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = -3.06122449 + 1 Reorder the terms: 1 + -2x + x2 = -3.06122449 + 1 Combine like terms: -3.06122449 + 1 = -2.06122449 1 + -2x + x2 = -2.06122449 Factor a perfect square on the left side: (x + -1)(x + -1) = -2.06122449 Can't calculate square root of the right side. The solution to this equation could not be determined.
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