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Simplifying 7x2 + -4x + -38 = 0 Reorder the terms: -38 + -4x + 7x2 = 0 Solving -38 + -4x + 7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. -5.428571429 + -0.5714285714x + x2 = 0 Move the constant term to the right: Add '5.428571429' to each side of the equation. -5.428571429 + -0.5714285714x + 5.428571429 + x2 = 0 + 5.428571429 Reorder the terms: -5.428571429 + 5.428571429 + -0.5714285714x + x2 = 0 + 5.428571429 Combine like terms: -5.428571429 + 5.428571429 = 0.000000000 0.000000000 + -0.5714285714x + x2 = 0 + 5.428571429 -0.5714285714x + x2 = 0 + 5.428571429 Combine like terms: 0 + 5.428571429 = 5.428571429 -0.5714285714x + x2 = 5.428571429 The x term is -0.5714285714x. Take half its coefficient (-0.2857142857). Square it (0.08163265305) and add it to both sides. Add '0.08163265305' to each side of the equation. -0.5714285714x + 0.08163265305 + x2 = 5.428571429 + 0.08163265305 Reorder the terms: 0.08163265305 + -0.5714285714x + x2 = 5.428571429 + 0.08163265305 Combine like terms: 5.428571429 + 0.08163265305 = 5.51020408205 0.08163265305 + -0.5714285714x + x2 = 5.51020408205 Factor a perfect square on the left side: (x + -0.2857142857)(x + -0.2857142857) = 5.51020408205 Calculate the square root of the right side: 2.347382389 Break this problem into two subproblems by setting (x + -0.2857142857) equal to 2.347382389 and -2.347382389.Subproblem 1
x + -0.2857142857 = 2.347382389 Simplifying x + -0.2857142857 = 2.347382389 Reorder the terms: -0.2857142857 + x = 2.347382389 Solving -0.2857142857 + x = 2.347382389 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2857142857' to each side of the equation. -0.2857142857 + 0.2857142857 + x = 2.347382389 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + x = 2.347382389 + 0.2857142857 x = 2.347382389 + 0.2857142857 Combine like terms: 2.347382389 + 0.2857142857 = 2.6330966747 x = 2.6330966747 Simplifying x = 2.6330966747Subproblem 2
x + -0.2857142857 = -2.347382389 Simplifying x + -0.2857142857 = -2.347382389 Reorder the terms: -0.2857142857 + x = -2.347382389 Solving -0.2857142857 + x = -2.347382389 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2857142857' to each side of the equation. -0.2857142857 + 0.2857142857 + x = -2.347382389 + 0.2857142857 Combine like terms: -0.2857142857 + 0.2857142857 = 0.0000000000 0.0000000000 + x = -2.347382389 + 0.2857142857 x = -2.347382389 + 0.2857142857 Combine like terms: -2.347382389 + 0.2857142857 = -2.0616681033 x = -2.0616681033 Simplifying x = -2.0616681033Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.6330966747, -2.0616681033}
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