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Simplifying 2x(3x + 5) + 5 = 8 Reorder the terms: 2x(5 + 3x) + 5 = 8 (5 * 2x + 3x * 2x) + 5 = 8 (10x + 6x2) + 5 = 8 Reorder the terms: 5 + 10x + 6x2 = 8 Solving 5 + 10x + 6x2 = 8 Solving for variable 'x'. Reorder the terms: 5 + -8 + 10x + 6x2 = 8 + -8 Combine like terms: 5 + -8 = -3 -3 + 10x + 6x2 = 8 + -8 Combine like terms: 8 + -8 = 0 -3 + 10x + 6x2 = 0 Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -0.5 + 1.666666667x + x2 = 0 Move the constant term to the right: Add '0.5' to each side of the equation. -0.5 + 1.666666667x + 0.5 + x2 = 0 + 0.5 Reorder the terms: -0.5 + 0.5 + 1.666666667x + x2 = 0 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + 1.666666667x + x2 = 0 + 0.5 1.666666667x + x2 = 0 + 0.5 Combine like terms: 0 + 0.5 = 0.5 1.666666667x + x2 = 0.5 The x term is 1.666666667x. Take half its coefficient (0.8333333335). Square it (0.6944444447) and add it to both sides. Add '0.6944444447' to each side of the equation. 1.666666667x + 0.6944444447 + x2 = 0.5 + 0.6944444447 Reorder the terms: 0.6944444447 + 1.666666667x + x2 = 0.5 + 0.6944444447 Combine like terms: 0.5 + 0.6944444447 = 1.1944444447 0.6944444447 + 1.666666667x + x2 = 1.1944444447 Factor a perfect square on the left side: (x + 0.8333333335)(x + 0.8333333335) = 1.1944444447 Calculate the square root of the right side: 1.092906421 Break this problem into two subproblems by setting (x + 0.8333333335) equal to 1.092906421 and -1.092906421.Subproblem 1
x + 0.8333333335 = 1.092906421 Simplifying x + 0.8333333335 = 1.092906421 Reorder the terms: 0.8333333335 + x = 1.092906421 Solving 0.8333333335 + x = 1.092906421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = 1.092906421 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = 1.092906421 + -0.8333333335 x = 1.092906421 + -0.8333333335 Combine like terms: 1.092906421 + -0.8333333335 = 0.2595730875 x = 0.2595730875 Simplifying x = 0.2595730875Subproblem 2
x + 0.8333333335 = -1.092906421 Simplifying x + 0.8333333335 = -1.092906421 Reorder the terms: 0.8333333335 + x = -1.092906421 Solving 0.8333333335 + x = -1.092906421 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + x = -1.092906421 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + x = -1.092906421 + -0.8333333335 x = -1.092906421 + -0.8333333335 Combine like terms: -1.092906421 + -0.8333333335 = -1.9262397545 x = -1.9262397545 Simplifying x = -1.9262397545Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.2595730875, -1.9262397545}
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