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Simplifying 7x2 + -14x + -11 = 0 Reorder the terms: -11 + -14x + 7x2 = 0 Solving -11 + -14x + 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'. -1.571428571 + -2x + x2 = 0 Move the constant term to the right: Add '1.571428571' to each side of the equation. -1.571428571 + -2x + 1.571428571 + x2 = 0 + 1.571428571 Reorder the terms: -1.571428571 + 1.571428571 + -2x + x2 = 0 + 1.571428571 Combine like terms: -1.571428571 + 1.571428571 = 0.000000000 0.000000000 + -2x + x2 = 0 + 1.571428571 -2x + x2 = 0 + 1.571428571 Combine like terms: 0 + 1.571428571 = 1.571428571 -2x + x2 = 1.571428571 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = 1.571428571 + 1 Reorder the terms: 1 + -2x + x2 = 1.571428571 + 1 Combine like terms: 1.571428571 + 1 = 2.571428571 1 + -2x + x2 = 2.571428571 Factor a perfect square on the left side: (x + -1)(x + -1) = 2.571428571 Calculate the square root of the right side: 1.603567451 Break this problem into two subproblems by setting (x + -1) equal to 1.603567451 and -1.603567451.Subproblem 1
x + -1 = 1.603567451 Simplifying x + -1 = 1.603567451 Reorder the terms: -1 + x = 1.603567451 Solving -1 + x = 1.603567451 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 1.603567451 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.603567451 + 1 x = 1.603567451 + 1 Combine like terms: 1.603567451 + 1 = 2.603567451 x = 2.603567451 Simplifying x = 2.603567451Subproblem 2
x + -1 = -1.603567451 Simplifying x + -1 = -1.603567451 Reorder the terms: -1 + x = -1.603567451 Solving -1 + x = -1.603567451 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -1.603567451 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.603567451 + 1 x = -1.603567451 + 1 Combine like terms: -1.603567451 + 1 = -0.603567451 x = -0.603567451 Simplifying x = -0.603567451Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.603567451, -0.603567451}
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