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Simplifying 10x2 + -19x + -28 = 0 Reorder the terms: -28 + -19x + 10x2 = 0 Solving -28 + -19x + 10x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 10 the coefficient of the squared term: Divide each side by '10'. -2.8 + -1.9x + x2 = 0 Move the constant term to the right: Add '2.8' to each side of the equation. -2.8 + -1.9x + 2.8 + x2 = 0 + 2.8 Reorder the terms: -2.8 + 2.8 + -1.9x + x2 = 0 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + -1.9x + x2 = 0 + 2.8 -1.9x + x2 = 0 + 2.8 Combine like terms: 0 + 2.8 = 2.8 -1.9x + x2 = 2.8 The x term is -1.9x. Take half its coefficient (-0.95). Square it (0.9025) and add it to both sides. Add '0.9025' to each side of the equation. -1.9x + 0.9025 + x2 = 2.8 + 0.9025 Reorder the terms: 0.9025 + -1.9x + x2 = 2.8 + 0.9025 Combine like terms: 2.8 + 0.9025 = 3.7025 0.9025 + -1.9x + x2 = 3.7025 Factor a perfect square on the left side: (x + -0.95)(x + -0.95) = 3.7025 Calculate the square root of the right side: 1.92418814 Break this problem into two subproblems by setting (x + -0.95) equal to 1.92418814 and -1.92418814.Subproblem 1
x + -0.95 = 1.92418814 Simplifying x + -0.95 = 1.92418814 Reorder the terms: -0.95 + x = 1.92418814 Solving -0.95 + x = 1.92418814 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + x = 1.92418814 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + x = 1.92418814 + 0.95 x = 1.92418814 + 0.95 Combine like terms: 1.92418814 + 0.95 = 2.87418814 x = 2.87418814 Simplifying x = 2.87418814Subproblem 2
x + -0.95 = -1.92418814 Simplifying x + -0.95 = -1.92418814 Reorder the terms: -0.95 + x = -1.92418814 Solving -0.95 + x = -1.92418814 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.95' to each side of the equation. -0.95 + 0.95 + x = -1.92418814 + 0.95 Combine like terms: -0.95 + 0.95 = 0.00 0.00 + x = -1.92418814 + 0.95 x = -1.92418814 + 0.95 Combine like terms: -1.92418814 + 0.95 = -0.97418814 x = -0.97418814 Simplifying x = -0.97418814Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.87418814, -0.97418814}
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