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Simplifying 5x2 + 16x + -15 = 0 Reorder the terms: -15 + 16x + 5x2 = 0 Solving -15 + 16x + 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'. -3 + 3.2x + x2 = 0 Move the constant term to the right: Add '3' to each side of the equation. -3 + 3.2x + 3 + x2 = 0 + 3 Reorder the terms: -3 + 3 + 3.2x + x2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 3.2x + x2 = 0 + 3 3.2x + x2 = 0 + 3 Combine like terms: 0 + 3 = 3 3.2x + x2 = 3 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 = 3 + 2.56 Reorder the terms: 2.56 + 3.2x + x2 = 3 + 2.56 Combine like terms: 3 + 2.56 = 5.56 2.56 + 3.2x + x2 = 5.56 Factor a perfect square on the left side: (x + 1.6)(x + 1.6) = 5.56 Calculate the square root of the right side: 2.357965225 Break this problem into two subproblems by setting (x + 1.6) equal to 2.357965225 and -2.357965225.Subproblem 1
x + 1.6 = 2.357965225 Simplifying x + 1.6 = 2.357965225 Reorder the terms: 1.6 + x = 2.357965225 Solving 1.6 + x = 2.357965225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + x = 2.357965225 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + x = 2.357965225 + -1.6 x = 2.357965225 + -1.6 Combine like terms: 2.357965225 + -1.6 = 0.757965225 x = 0.757965225 Simplifying x = 0.757965225Subproblem 2
x + 1.6 = -2.357965225 Simplifying x + 1.6 = -2.357965225 Reorder the terms: 1.6 + x = -2.357965225 Solving 1.6 + x = -2.357965225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + x = -2.357965225 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + x = -2.357965225 + -1.6 x = -2.357965225 + -1.6 Combine like terms: -2.357965225 + -1.6 = -3.957965225 x = -3.957965225 Simplifying x = -3.957965225Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.757965225, -3.957965225}
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