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Simplifying 4x + 5(x2 + x + -2) = 0 Reorder the terms: 4x + 5(-2 + x + x2) = 0 4x + (-2 * 5 + x * 5 + x2 * 5) = 0 4x + (-10 + 5x + 5x2) = 0 Reorder the terms: -10 + 4x + 5x + 5x2 = 0 Combine like terms: 4x + 5x = 9x -10 + 9x + 5x2 = 0 Solving -10 + 9x + 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'. -2 + 1.8x + x2 = 0 Move the constant term to the right: Add '2' to each side of the equation. -2 + 1.8x + 2 + x2 = 0 + 2 Reorder the terms: -2 + 2 + 1.8x + x2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + 1.8x + x2 = 0 + 2 1.8x + x2 = 0 + 2 Combine like terms: 0 + 2 = 2 1.8x + x2 = 2 The x term is 1.8x. Take half its coefficient (0.9). Square it (0.81) and add it to both sides. Add '0.81' to each side of the equation. 1.8x + 0.81 + x2 = 2 + 0.81 Reorder the terms: 0.81 + 1.8x + x2 = 2 + 0.81 Combine like terms: 2 + 0.81 = 2.81 0.81 + 1.8x + x2 = 2.81 Factor a perfect square on the left side: (x + 0.9)(x + 0.9) = 2.81 Calculate the square root of the right side: 1.676305461 Break this problem into two subproblems by setting (x + 0.9) equal to 1.676305461 and -1.676305461.Subproblem 1
x + 0.9 = 1.676305461 Simplifying x + 0.9 = 1.676305461 Reorder the terms: 0.9 + x = 1.676305461 Solving 0.9 + x = 1.676305461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 1.676305461 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 1.676305461 + -0.9 x = 1.676305461 + -0.9 Combine like terms: 1.676305461 + -0.9 = 0.776305461 x = 0.776305461 Simplifying x = 0.776305461Subproblem 2
x + 0.9 = -1.676305461 Simplifying x + 0.9 = -1.676305461 Reorder the terms: 0.9 + x = -1.676305461 Solving 0.9 + x = -1.676305461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -1.676305461 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -1.676305461 + -0.9 x = -1.676305461 + -0.9 Combine like terms: -1.676305461 + -0.9 = -2.576305461 x = -2.576305461 Simplifying x = -2.576305461Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.776305461, -2.576305461}
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