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Simplifying x(x + 15) = 60 Reorder the terms: x(15 + x) = 60 (15 * x + x * x) = 60 (15x + x2) = 60 Solving 15x + x2 = 60 Solving for variable 'x'. Reorder the terms: -60 + 15x + x2 = 60 + -60 Combine like terms: 60 + -60 = 0 -60 + 15x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '60' to each side of the equation. -60 + 15x + 60 + x2 = 0 + 60 Reorder the terms: -60 + 60 + 15x + x2 = 0 + 60 Combine like terms: -60 + 60 = 0 0 + 15x + x2 = 0 + 60 15x + x2 = 0 + 60 Combine like terms: 0 + 60 = 60 15x + x2 = 60 The x term is 15x. Take half its coefficient (7.5). Square it (56.25) and add it to both sides. Add '56.25' to each side of the equation. 15x + 56.25 + x2 = 60 + 56.25 Reorder the terms: 56.25 + 15x + x2 = 60 + 56.25 Combine like terms: 60 + 56.25 = 116.25 56.25 + 15x + x2 = 116.25 Factor a perfect square on the left side: (x + 7.5)(x + 7.5) = 116.25 Calculate the square root of the right side: 10.781929326 Break this problem into two subproblems by setting (x + 7.5) equal to 10.781929326 and -10.781929326.Subproblem 1
x + 7.5 = 10.781929326 Simplifying x + 7.5 = 10.781929326 Reorder the terms: 7.5 + x = 10.781929326 Solving 7.5 + x = 10.781929326 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + x = 10.781929326 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + x = 10.781929326 + -7.5 x = 10.781929326 + -7.5 Combine like terms: 10.781929326 + -7.5 = 3.281929326 x = 3.281929326 Simplifying x = 3.281929326Subproblem 2
x + 7.5 = -10.781929326 Simplifying x + 7.5 = -10.781929326 Reorder the terms: 7.5 + x = -10.781929326 Solving 7.5 + x = -10.781929326 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + x = -10.781929326 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + x = -10.781929326 + -7.5 x = -10.781929326 + -7.5 Combine like terms: -10.781929326 + -7.5 = -18.281929326 x = -18.281929326 Simplifying x = -18.281929326Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.281929326, -18.281929326}
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