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Simplifying 7x2 + -6x + 2 = 9 Reorder the terms: 2 + -6x + 7x2 = 9 Solving 2 + -6x + 7x2 = 9 Solving for variable 'x'. Reorder the terms: 2 + -9 + -6x + 7x2 = 9 + -9 Combine like terms: 2 + -9 = -7 -7 + -6x + 7x2 = 9 + -9 Combine like terms: 9 + -9 = 0 -7 + -6x + 7x2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. -1 + -0.8571428571x + x2 = 0 Move the constant term to the right: Add '1' to each side of the equation. -1 + -0.8571428571x + 1 + x2 = 0 + 1 Reorder the terms: -1 + 1 + -0.8571428571x + x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -0.8571428571x + x2 = 0 + 1 -0.8571428571x + x2 = 0 + 1 Combine like terms: 0 + 1 = 1 -0.8571428571x + x2 = 1 The x term is -0.8571428571x. Take half its coefficient (-0.4285714286). Square it (0.1836734694) and add it to both sides. Add '0.1836734694' to each side of the equation. -0.8571428571x + 0.1836734694 + x2 = 1 + 0.1836734694 Reorder the terms: 0.1836734694 + -0.8571428571x + x2 = 1 + 0.1836734694 Combine like terms: 1 + 0.1836734694 = 1.1836734694 0.1836734694 + -0.8571428571x + x2 = 1.1836734694 Factor a perfect square on the left side: (x + -0.4285714286)(x + -0.4285714286) = 1.1836734694 Calculate the square root of the right side: 1.087967587 Break this problem into two subproblems by setting (x + -0.4285714286) equal to 1.087967587 and -1.087967587.Subproblem 1
x + -0.4285714286 = 1.087967587 Simplifying x + -0.4285714286 = 1.087967587 Reorder the terms: -0.4285714286 + x = 1.087967587 Solving -0.4285714286 + x = 1.087967587 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4285714286' to each side of the equation. -0.4285714286 + 0.4285714286 + x = 1.087967587 + 0.4285714286 Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000 0.0000000000 + x = 1.087967587 + 0.4285714286 x = 1.087967587 + 0.4285714286 Combine like terms: 1.087967587 + 0.4285714286 = 1.5165390156 x = 1.5165390156 Simplifying x = 1.5165390156Subproblem 2
x + -0.4285714286 = -1.087967587 Simplifying x + -0.4285714286 = -1.087967587 Reorder the terms: -0.4285714286 + x = -1.087967587 Solving -0.4285714286 + x = -1.087967587 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4285714286' to each side of the equation. -0.4285714286 + 0.4285714286 + x = -1.087967587 + 0.4285714286 Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000 0.0000000000 + x = -1.087967587 + 0.4285714286 x = -1.087967587 + 0.4285714286 Combine like terms: -1.087967587 + 0.4285714286 = -0.6593961584 x = -0.6593961584 Simplifying x = -0.6593961584Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.5165390156, -0.6593961584}
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