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Simplifying 9x2 + -20x + -4 = 0 Reorder the terms: -4 + -20x + 9x2 = 0 Solving -4 + -20x + 9x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. -0.4444444444 + -2.222222222x + x2 = 0 Move the constant term to the right: Add '0.4444444444' to each side of the equation. -0.4444444444 + -2.222222222x + 0.4444444444 + x2 = 0 + 0.4444444444 Reorder the terms: -0.4444444444 + 0.4444444444 + -2.222222222x + x2 = 0 + 0.4444444444 Combine like terms: -0.4444444444 + 0.4444444444 = 0.0000000000 0.0000000000 + -2.222222222x + x2 = 0 + 0.4444444444 -2.222222222x + x2 = 0 + 0.4444444444 Combine like terms: 0 + 0.4444444444 = 0.4444444444 -2.222222222x + x2 = 0.4444444444 The x term is -2.222222222x. Take half its coefficient (-1.111111111). Square it (1.234567901) and add it to both sides. Add '1.234567901' to each side of the equation. -2.222222222x + 1.234567901 + x2 = 0.4444444444 + 1.234567901 Reorder the terms: 1.234567901 + -2.222222222x + x2 = 0.4444444444 + 1.234567901 Combine like terms: 0.4444444444 + 1.234567901 = 1.6790123454 1.234567901 + -2.222222222x + x2 = 1.6790123454 Factor a perfect square on the left side: (x + -1.111111111)(x + -1.111111111) = 1.6790123454 Calculate the square root of the right side: 1.295767088 Break this problem into two subproblems by setting (x + -1.111111111) equal to 1.295767088 and -1.295767088.Subproblem 1
x + -1.111111111 = 1.295767088 Simplifying x + -1.111111111 = 1.295767088 Reorder the terms: -1.111111111 + x = 1.295767088 Solving -1.111111111 + x = 1.295767088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.111111111' to each side of the equation. -1.111111111 + 1.111111111 + x = 1.295767088 + 1.111111111 Combine like terms: -1.111111111 + 1.111111111 = 0.000000000 0.000000000 + x = 1.295767088 + 1.111111111 x = 1.295767088 + 1.111111111 Combine like terms: 1.295767088 + 1.111111111 = 2.406878199 x = 2.406878199 Simplifying x = 2.406878199Subproblem 2
x + -1.111111111 = -1.295767088 Simplifying x + -1.111111111 = -1.295767088 Reorder the terms: -1.111111111 + x = -1.295767088 Solving -1.111111111 + x = -1.295767088 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.111111111' to each side of the equation. -1.111111111 + 1.111111111 + x = -1.295767088 + 1.111111111 Combine like terms: -1.111111111 + 1.111111111 = 0.000000000 0.000000000 + x = -1.295767088 + 1.111111111 x = -1.295767088 + 1.111111111 Combine like terms: -1.295767088 + 1.111111111 = -0.184655977 x = -0.184655977 Simplifying x = -0.184655977Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.406878199, -0.184655977}
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