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Simplifying 9x2 + 18x + 81 = 84 Reorder the terms: 81 + 18x + 9x2 = 84 Solving 81 + 18x + 9x2 = 84 Solving for variable 'x'. Reorder the terms: 81 + -84 + 18x + 9x2 = 84 + -84 Combine like terms: 81 + -84 = -3 -3 + 18x + 9x2 = 84 + -84 Combine like terms: 84 + -84 = 0 -3 + 18x + 9x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(-1 + 6x + 3x2) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-1 + 6x + 3x2)' equal to zero and attempt to solve: Simplifying -1 + 6x + 3x2 = 0 Solving -1 + 6x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -0.3333333333 + 2x + x2 = 0 Move the constant term to the right: Add '0.3333333333' to each side of the equation. -0.3333333333 + 2x + 0.3333333333 + x2 = 0 + 0.3333333333 Reorder the terms: -0.3333333333 + 0.3333333333 + 2x + x2 = 0 + 0.3333333333 Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000 0.0000000000 + 2x + x2 = 0 + 0.3333333333 2x + x2 = 0 + 0.3333333333 Combine like terms: 0 + 0.3333333333 = 0.3333333333 2x + x2 = 0.3333333333 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 0.3333333333 + 1 Reorder the terms: 1 + 2x + x2 = 0.3333333333 + 1 Combine like terms: 0.3333333333 + 1 = 1.3333333333 1 + 2x + x2 = 1.3333333333 Factor a perfect square on the left side: (x + 1)(x + 1) = 1.3333333333 Calculate the square root of the right side: 1.154700538 Break this problem into two subproblems by setting (x + 1) equal to 1.154700538 and -1.154700538.Subproblem 1
x + 1 = 1.154700538 Simplifying x + 1 = 1.154700538 Reorder the terms: 1 + x = 1.154700538 Solving 1 + x = 1.154700538 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.154700538 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.154700538 + -1 x = 1.154700538 + -1 Combine like terms: 1.154700538 + -1 = 0.154700538 x = 0.154700538 Simplifying x = 0.154700538Subproblem 2
x + 1 = -1.154700538 Simplifying x + 1 = -1.154700538 Reorder the terms: 1 + x = -1.154700538 Solving 1 + x = -1.154700538 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.154700538 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.154700538 + -1 x = -1.154700538 + -1 Combine like terms: -1.154700538 + -1 = -2.154700538 x = -2.154700538 Simplifying x = -2.154700538Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.154700538, -2.154700538}Solution
x = {0.154700538, -2.154700538}
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