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Simplifying 9x2 + 14x + -49 = 0 Reorder the terms: -49 + 14x + 9x2 = 0 Solving -49 + 14x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. -5.444444444 + 1.555555556x + x2 = 0 Move the constant term to the right: Add '5.444444444' to each side of the equation. -5.444444444 + 1.555555556x + 5.444444444 + x2 = 0 + 5.444444444 Reorder the terms: -5.444444444 + 5.444444444 + 1.555555556x + x2 = 0 + 5.444444444 Combine like terms: -5.444444444 + 5.444444444 = 0.000000000 0.000000000 + 1.555555556x + x2 = 0 + 5.444444444 1.555555556x + x2 = 0 + 5.444444444 Combine like terms: 0 + 5.444444444 = 5.444444444 1.555555556x + x2 = 5.444444444 The x term is 1.555555556x. Take half its coefficient (0.777777778). Square it (0.6049382720) and add it to both sides. Add '0.6049382720' to each side of the equation. 1.555555556x + 0.6049382720 + x2 = 5.444444444 + 0.6049382720 Reorder the terms: 0.6049382720 + 1.555555556x + x2 = 5.444444444 + 0.6049382720 Combine like terms: 5.444444444 + 0.6049382720 = 6.049382716 0.6049382720 + 1.555555556x + x2 = 6.049382716 Factor a perfect square on the left side: (x + 0.777777778)(x + 0.777777778) = 6.049382716 Calculate the square root of the right side: 2.459549291 Break this problem into two subproblems by setting (x + 0.777777778) equal to 2.459549291 and -2.459549291.Subproblem 1
x + 0.777777778 = 2.459549291 Simplifying x + 0.777777778 = 2.459549291 Reorder the terms: 0.777777778 + x = 2.459549291 Solving 0.777777778 + x = 2.459549291 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.777777778' to each side of the equation. 0.777777778 + -0.777777778 + x = 2.459549291 + -0.777777778 Combine like terms: 0.777777778 + -0.777777778 = 0.000000000 0.000000000 + x = 2.459549291 + -0.777777778 x = 2.459549291 + -0.777777778 Combine like terms: 2.459549291 + -0.777777778 = 1.681771513 x = 1.681771513 Simplifying x = 1.681771513Subproblem 2
x + 0.777777778 = -2.459549291 Simplifying x + 0.777777778 = -2.459549291 Reorder the terms: 0.777777778 + x = -2.459549291 Solving 0.777777778 + x = -2.459549291 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.777777778' to each side of the equation. 0.777777778 + -0.777777778 + x = -2.459549291 + -0.777777778 Combine like terms: 0.777777778 + -0.777777778 = 0.000000000 0.000000000 + x = -2.459549291 + -0.777777778 x = -2.459549291 + -0.777777778 Combine like terms: -2.459549291 + -0.777777778 = -3.237327069 x = -3.237327069 Simplifying x = -3.237327069Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.681771513, -3.237327069}
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