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Simplifying x * x + -4.8x + 2.1 = 0 Multiply x * x x2 + -4.8x + 2.1 = 0 Reorder the terms: 2.1 + -4.8x + x2 = 0 Solving 2.1 + -4.8x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '-2.1' to each side of the equation. 2.1 + -4.8x + -2.1 + x2 = 0 + -2.1 Reorder the terms: 2.1 + -2.1 + -4.8x + x2 = 0 + -2.1 Combine like terms: 2.1 + -2.1 = 0.0 0.0 + -4.8x + x2 = 0 + -2.1 -4.8x + x2 = 0 + -2.1 Combine like terms: 0 + -2.1 = -2.1 -4.8x + x2 = -2.1 The x term is -4.8x. Take half its coefficient (-2.4). Square it (5.76) and add it to both sides. Add '5.76' to each side of the equation. -4.8x + 5.76 + x2 = -2.1 + 5.76 Reorder the terms: 5.76 + -4.8x + x2 = -2.1 + 5.76 Combine like terms: -2.1 + 5.76 = 3.66 5.76 + -4.8x + x2 = 3.66 Factor a perfect square on the left side: (x + -2.4)(x + -2.4) = 3.66 Calculate the square root of the right side: 1.913112647 Break this problem into two subproblems by setting (x + -2.4) equal to 1.913112647 and -1.913112647.Subproblem 1
x + -2.4 = 1.913112647 Simplifying x + -2.4 = 1.913112647 Reorder the terms: -2.4 + x = 1.913112647 Solving -2.4 + x = 1.913112647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.4' to each side of the equation. -2.4 + 2.4 + x = 1.913112647 + 2.4 Combine like terms: -2.4 + 2.4 = 0.0 0.0 + x = 1.913112647 + 2.4 x = 1.913112647 + 2.4 Combine like terms: 1.913112647 + 2.4 = 4.313112647 x = 4.313112647 Simplifying x = 4.313112647Subproblem 2
x + -2.4 = -1.913112647 Simplifying x + -2.4 = -1.913112647 Reorder the terms: -2.4 + x = -1.913112647 Solving -2.4 + x = -1.913112647 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.4' to each side of the equation. -2.4 + 2.4 + x = -1.913112647 + 2.4 Combine like terms: -2.4 + 2.4 = 0.0 0.0 + x = -1.913112647 + 2.4 x = -1.913112647 + 2.4 Combine like terms: -1.913112647 + 2.4 = 0.486887353 x = 0.486887353 Simplifying x = 0.486887353Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.313112647, 0.486887353}
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