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Simplifying x(5x + 2) = 4 Reorder the terms: x(2 + 5x) = 4 (2 * x + 5x * x) = 4 (2x + 5x2) = 4 Solving 2x + 5x2 = 4 Solving for variable 'x'. Reorder the terms: -4 + 2x + 5x2 = 4 + -4 Combine like terms: 4 + -4 = 0 -4 + 2x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -0.8 + 0.4x + x2 = 0 Move the constant term to the right: Add '0.8' to each side of the equation. -0.8 + 0.4x + 0.8 + x2 = 0 + 0.8 Reorder the terms: -0.8 + 0.8 + 0.4x + x2 = 0 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + 0.4x + x2 = 0 + 0.8 0.4x + x2 = 0 + 0.8 Combine like terms: 0 + 0.8 = 0.8 0.4x + x2 = 0.8 The x term is 0.4x. Take half its coefficient (0.2). Square it (0.04) and add it to both sides. Add '0.04' to each side of the equation. 0.4x + 0.04 + x2 = 0.8 + 0.04 Reorder the terms: 0.04 + 0.4x + x2 = 0.8 + 0.04 Combine like terms: 0.8 + 0.04 = 0.84 0.04 + 0.4x + x2 = 0.84 Factor a perfect square on the left side: (x + 0.2)(x + 0.2) = 0.84 Calculate the square root of the right side: 0.916515139 Break this problem into two subproblems by setting (x + 0.2) equal to 0.916515139 and -0.916515139.Subproblem 1
x + 0.2 = 0.916515139 Simplifying x + 0.2 = 0.916515139 Reorder the terms: 0.2 + x = 0.916515139 Solving 0.2 + x = 0.916515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = 0.916515139 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = 0.916515139 + -0.2 x = 0.916515139 + -0.2 Combine like terms: 0.916515139 + -0.2 = 0.716515139 x = 0.716515139 Simplifying x = 0.716515139Subproblem 2
x + 0.2 = -0.916515139 Simplifying x + 0.2 = -0.916515139 Reorder the terms: 0.2 + x = -0.916515139 Solving 0.2 + x = -0.916515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = -0.916515139 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = -0.916515139 + -0.2 x = -0.916515139 + -0.2 Combine like terms: -0.916515139 + -0.2 = -1.116515139 x = -1.116515139 Simplifying x = -1.116515139Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.716515139, -1.116515139}
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