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Simplifying 7x2 + -11x + 3 = 0 Reorder the terms: 3 + -11x + 7x2 = 0 Solving 3 + -11x + 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'. 0.4285714286 + -1.571428571x + x2 = 0 Move the constant term to the right: Add '-0.4285714286' to each side of the equation. 0.4285714286 + -1.571428571x + -0.4285714286 + x2 = 0 + -0.4285714286 Reorder the terms: 0.4285714286 + -0.4285714286 + -1.571428571x + x2 = 0 + -0.4285714286 Combine like terms: 0.4285714286 + -0.4285714286 = 0.0000000000 0.0000000000 + -1.571428571x + x2 = 0 + -0.4285714286 -1.571428571x + x2 = 0 + -0.4285714286 Combine like terms: 0 + -0.4285714286 = -0.4285714286 -1.571428571x + x2 = -0.4285714286 The x term is -1.571428571x. Take half its coefficient (-0.7857142855). Square it (0.6173469384) and add it to both sides. Add '0.6173469384' to each side of the equation. -1.571428571x + 0.6173469384 + x2 = -0.4285714286 + 0.6173469384 Reorder the terms: 0.6173469384 + -1.571428571x + x2 = -0.4285714286 + 0.6173469384 Combine like terms: -0.4285714286 + 0.6173469384 = 0.1887755098 0.6173469384 + -1.571428571x + x2 = 0.1887755098 Factor a perfect square on the left side: (x + -0.7857142855)(x + -0.7857142855) = 0.1887755098 Calculate the square root of the right side: 0.434483037 Break this problem into two subproblems by setting (x + -0.7857142855) equal to 0.434483037 and -0.434483037.Subproblem 1
x + -0.7857142855 = 0.434483037 Simplifying x + -0.7857142855 = 0.434483037 Reorder the terms: -0.7857142855 + x = 0.434483037 Solving -0.7857142855 + x = 0.434483037 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7857142855' to each side of the equation. -0.7857142855 + 0.7857142855 + x = 0.434483037 + 0.7857142855 Combine like terms: -0.7857142855 + 0.7857142855 = 0.0000000000 0.0000000000 + x = 0.434483037 + 0.7857142855 x = 0.434483037 + 0.7857142855 Combine like terms: 0.434483037 + 0.7857142855 = 1.2201973225 x = 1.2201973225 Simplifying x = 1.2201973225Subproblem 2
x + -0.7857142855 = -0.434483037 Simplifying x + -0.7857142855 = -0.434483037 Reorder the terms: -0.7857142855 + x = -0.434483037 Solving -0.7857142855 + x = -0.434483037 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7857142855' to each side of the equation. -0.7857142855 + 0.7857142855 + x = -0.434483037 + 0.7857142855 Combine like terms: -0.7857142855 + 0.7857142855 = 0.0000000000 0.0000000000 + x = -0.434483037 + 0.7857142855 x = -0.434483037 + 0.7857142855 Combine like terms: -0.434483037 + 0.7857142855 = 0.3512312485 x = 0.3512312485 Simplifying x = 0.3512312485Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.2201973225, 0.3512312485}
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