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Simplifying 15x2 + 27x + -2 = 0 Reorder the terms: -2 + 27x + 15x2 = 0 Solving -2 + 27x + 15x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 15 the coefficient of the squared term: Divide each side by '15'. -0.1333333333 + 1.8x + x2 = 0 Move the constant term to the right: Add '0.1333333333' to each side of the equation. -0.1333333333 + 1.8x + 0.1333333333 + x2 = 0 + 0.1333333333 Reorder the terms: -0.1333333333 + 0.1333333333 + 1.8x + x2 = 0 + 0.1333333333 Combine like terms: -0.1333333333 + 0.1333333333 = 0.0000000000 0.0000000000 + 1.8x + x2 = 0 + 0.1333333333 1.8x + x2 = 0 + 0.1333333333 Combine like terms: 0 + 0.1333333333 = 0.1333333333 1.8x + x2 = 0.1333333333 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 = 0.1333333333 + 0.81 Reorder the terms: 0.81 + 1.8x + x2 = 0.1333333333 + 0.81 Combine like terms: 0.1333333333 + 0.81 = 0.9433333333 0.81 + 1.8x + x2 = 0.9433333333 Factor a perfect square on the left side: (x + 0.9)(x + 0.9) = 0.9433333333 Calculate the square root of the right side: 0.971253486 Break this problem into two subproblems by setting (x + 0.9) equal to 0.971253486 and -0.971253486.Subproblem 1
x + 0.9 = 0.971253486 Simplifying x + 0.9 = 0.971253486 Reorder the terms: 0.9 + x = 0.971253486 Solving 0.9 + x = 0.971253486 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 = 0.971253486 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 0.971253486 + -0.9 x = 0.971253486 + -0.9 Combine like terms: 0.971253486 + -0.9 = 0.071253486 x = 0.071253486 Simplifying x = 0.071253486Subproblem 2
x + 0.9 = -0.971253486 Simplifying x + 0.9 = -0.971253486 Reorder the terms: 0.9 + x = -0.971253486 Solving 0.9 + x = -0.971253486 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 = -0.971253486 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -0.971253486 + -0.9 x = -0.971253486 + -0.9 Combine like terms: -0.971253486 + -0.9 = -1.871253486 x = -1.871253486 Simplifying x = -1.871253486Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.071253486, -1.871253486}
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