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Simplifying x(5x + -8) = -2 Reorder the terms: x(-8 + 5x) = -2 (-8 * x + 5x * x) = -2 (-8x + 5x2) = -2 Solving -8x + 5x2 = -2 Solving for variable 'x'. Reorder the terms: 2 + -8x + 5x2 = -2 + 2 Combine like terms: -2 + 2 = 0 2 + -8x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 0.4 + -1.6x + x2 = 0 Move the constant term to the right: Add '-0.4' to each side of the equation. 0.4 + -1.6x + -0.4 + x2 = 0 + -0.4 Reorder the terms: 0.4 + -0.4 + -1.6x + x2 = 0 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + -1.6x + x2 = 0 + -0.4 -1.6x + x2 = 0 + -0.4 Combine like terms: 0 + -0.4 = -0.4 -1.6x + x2 = -0.4 The x term is -1.6x. Take half its coefficient (-0.8). Square it (0.64) and add it to both sides. Add '0.64' to each side of the equation. -1.6x + 0.64 + x2 = -0.4 + 0.64 Reorder the terms: 0.64 + -1.6x + x2 = -0.4 + 0.64 Combine like terms: -0.4 + 0.64 = 0.24 0.64 + -1.6x + x2 = 0.24 Factor a perfect square on the left side: (x + -0.8)(x + -0.8) = 0.24 Calculate the square root of the right side: 0.489897949 Break this problem into two subproblems by setting (x + -0.8) equal to 0.489897949 and -0.489897949.Subproblem 1
x + -0.8 = 0.489897949 Simplifying x + -0.8 = 0.489897949 Reorder the terms: -0.8 + x = 0.489897949 Solving -0.8 + x = 0.489897949 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = 0.489897949 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = 0.489897949 + 0.8 x = 0.489897949 + 0.8 Combine like terms: 0.489897949 + 0.8 = 1.289897949 x = 1.289897949 Simplifying x = 1.289897949Subproblem 2
x + -0.8 = -0.489897949 Simplifying x + -0.8 = -0.489897949 Reorder the terms: -0.8 + x = -0.489897949 Solving -0.8 + x = -0.489897949 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.8' to each side of the equation. -0.8 + 0.8 + x = -0.489897949 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + x = -0.489897949 + 0.8 x = -0.489897949 + 0.8 Combine like terms: -0.489897949 + 0.8 = 0.310102051 x = 0.310102051 Simplifying x = 0.310102051Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.289897949, 0.310102051}
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