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Simplifying 5x2 + 9x + -3 = 8 Reorder the terms: -3 + 9x + 5x2 = 8 Solving -3 + 9x + 5x2 = 8 Solving for variable 'x'. Reorder the terms: -3 + -8 + 9x + 5x2 = 8 + -8 Combine like terms: -3 + -8 = -11 -11 + 9x + 5x2 = 8 + -8 Combine like terms: 8 + -8 = 0 -11 + 9x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -2.2 + 1.8x + x2 = 0 Move the constant term to the right: Add '2.2' to each side of the equation. -2.2 + 1.8x + 2.2 + x2 = 0 + 2.2 Reorder the terms: -2.2 + 2.2 + 1.8x + x2 = 0 + 2.2 Combine like terms: -2.2 + 2.2 = 0.0 0.0 + 1.8x + x2 = 0 + 2.2 1.8x + x2 = 0 + 2.2 Combine like terms: 0 + 2.2 = 2.2 1.8x + x2 = 2.2 The x term is 1.8x. Take half its coefficient (0.9). Square it (0.81) and add it to both sides. Add '0.81' to each side of the equation. 1.8x + 0.81 + x2 = 2.2 + 0.81 Reorder the terms: 0.81 + 1.8x + x2 = 2.2 + 0.81 Combine like terms: 2.2 + 0.81 = 3.01 0.81 + 1.8x + x2 = 3.01 Factor a perfect square on the left side: (x + 0.9)(x + 0.9) = 3.01 Calculate the square root of the right side: 1.734935157 Break this problem into two subproblems by setting (x + 0.9) equal to 1.734935157 and -1.734935157.Subproblem 1
x + 0.9 = 1.734935157 Simplifying x + 0.9 = 1.734935157 Reorder the terms: 0.9 + x = 1.734935157 Solving 0.9 + x = 1.734935157 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 1.734935157 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 1.734935157 + -0.9 x = 1.734935157 + -0.9 Combine like terms: 1.734935157 + -0.9 = 0.834935157 x = 0.834935157 Simplifying x = 0.834935157Subproblem 2
x + 0.9 = -1.734935157 Simplifying x + 0.9 = -1.734935157 Reorder the terms: 0.9 + x = -1.734935157 Solving 0.9 + x = -1.734935157 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -1.734935157 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -1.734935157 + -0.9 x = -1.734935157 + -0.9 Combine like terms: -1.734935157 + -0.9 = -2.634935157 x = -2.634935157 Simplifying x = -2.634935157Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.834935157, -2.634935157}
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