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Simplifying 5x2 + 14x + -47 = 0 Reorder the terms: -47 + 14x + 5x2 = 0 Solving -47 + 14x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -9.4 + 2.8x + x2 = 0 Move the constant term to the right: Add '9.4' to each side of the equation. -9.4 + 2.8x + 9.4 + x2 = 0 + 9.4 Reorder the terms: -9.4 + 9.4 + 2.8x + x2 = 0 + 9.4 Combine like terms: -9.4 + 9.4 = 0.0 0.0 + 2.8x + x2 = 0 + 9.4 2.8x + x2 = 0 + 9.4 Combine like terms: 0 + 9.4 = 9.4 2.8x + x2 = 9.4 The x term is 2.8x. Take half its coefficient (1.4). Square it (1.96) and add it to both sides. Add '1.96' to each side of the equation. 2.8x + 1.96 + x2 = 9.4 + 1.96 Reorder the terms: 1.96 + 2.8x + x2 = 9.4 + 1.96 Combine like terms: 9.4 + 1.96 = 11.36 1.96 + 2.8x + x2 = 11.36 Factor a perfect square on the left side: (x + 1.4)(x + 1.4) = 11.36 Calculate the square root of the right side: 3.370459909 Break this problem into two subproblems by setting (x + 1.4) equal to 3.370459909 and -3.370459909.Subproblem 1
x + 1.4 = 3.370459909 Simplifying x + 1.4 = 3.370459909 Reorder the terms: 1.4 + x = 3.370459909 Solving 1.4 + x = 3.370459909 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.4' to each side of the equation. 1.4 + -1.4 + x = 3.370459909 + -1.4 Combine like terms: 1.4 + -1.4 = 0.0 0.0 + x = 3.370459909 + -1.4 x = 3.370459909 + -1.4 Combine like terms: 3.370459909 + -1.4 = 1.970459909 x = 1.970459909 Simplifying x = 1.970459909Subproblem 2
x + 1.4 = -3.370459909 Simplifying x + 1.4 = -3.370459909 Reorder the terms: 1.4 + x = -3.370459909 Solving 1.4 + x = -3.370459909 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.4' to each side of the equation. 1.4 + -1.4 + x = -3.370459909 + -1.4 Combine like terms: 1.4 + -1.4 = 0.0 0.0 + x = -3.370459909 + -1.4 x = -3.370459909 + -1.4 Combine like terms: -3.370459909 + -1.4 = -4.770459909 x = -4.770459909 Simplifying x = -4.770459909Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.970459909, -4.770459909}
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