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Simplifying 15 = -16x2 + 29x + 3.8 Reorder the terms: 15 = 3.8 + 29x + -16x2 Solving 15 = 3.8 + 29x + -16x2 Solving for variable 'x'. Combine like terms: 15 + -3.8 = 11.2 11.2 + -29x + 16x2 = 3.8 + 29x + -16x2 + -3.8 + -29x + 16x2 Reorder the terms: 11.2 + -29x + 16x2 = 3.8 + -3.8 + 29x + -29x + -16x2 + 16x2 Combine like terms: 3.8 + -3.8 = 0.0 11.2 + -29x + 16x2 = 0.0 + 29x + -29x + -16x2 + 16x2 11.2 + -29x + 16x2 = 29x + -29x + -16x2 + 16x2 Combine like terms: 29x + -29x = 0 11.2 + -29x + 16x2 = 0 + -16x2 + 16x2 11.2 + -29x + 16x2 = -16x2 + 16x2 Combine like terms: -16x2 + 16x2 = 0 11.2 + -29x + 16x2 = 0 Begin completing the square. Divide all terms by 16 the coefficient of the squared term: Divide each side by '16'. 0.7 + -1.8125x + x2 = 0 Move the constant term to the right: Add '-0.7' to each side of the equation. 0.7 + -1.8125x + -0.7 + x2 = 0 + -0.7 Reorder the terms: 0.7 + -0.7 + -1.8125x + x2 = 0 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + -1.8125x + x2 = 0 + -0.7 -1.8125x + x2 = 0 + -0.7 Combine like terms: 0 + -0.7 = -0.7 -1.8125x + x2 = -0.7 The x term is -1.8125x. Take half its coefficient (-0.90625). Square it (0.8212890625) and add it to both sides. Add '0.8212890625' to each side of the equation. -1.8125x + 0.8212890625 + x2 = -0.7 + 0.8212890625 Reorder the terms: 0.8212890625 + -1.8125x + x2 = -0.7 + 0.8212890625 Combine like terms: -0.7 + 0.8212890625 = 0.1212890625 0.8212890625 + -1.8125x + x2 = 0.1212890625 Factor a perfect square on the left side: (x + -0.90625)(x + -0.90625) = 0.1212890625 Calculate the square root of the right side: 0.348265793 Break this problem into two subproblems by setting (x + -0.90625) equal to 0.348265793 and -0.348265793.Subproblem 1
x + -0.90625 = 0.348265793 Simplifying x + -0.90625 = 0.348265793 Reorder the terms: -0.90625 + x = 0.348265793 Solving -0.90625 + x = 0.348265793 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.90625' to each side of the equation. -0.90625 + 0.90625 + x = 0.348265793 + 0.90625 Combine like terms: -0.90625 + 0.90625 = 0.00000 0.00000 + x = 0.348265793 + 0.90625 x = 0.348265793 + 0.90625 Combine like terms: 0.348265793 + 0.90625 = 1.254515793 x = 1.254515793 Simplifying x = 1.254515793Subproblem 2
x + -0.90625 = -0.348265793 Simplifying x + -0.90625 = -0.348265793 Reorder the terms: -0.90625 + x = -0.348265793 Solving -0.90625 + x = -0.348265793 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.90625' to each side of the equation. -0.90625 + 0.90625 + x = -0.348265793 + 0.90625 Combine like terms: -0.90625 + 0.90625 = 0.00000 0.00000 + x = -0.348265793 + 0.90625 x = -0.348265793 + 0.90625 Combine like terms: -0.348265793 + 0.90625 = 0.557984207 x = 0.557984207 Simplifying x = 0.557984207Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.254515793, 0.557984207}
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