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Simplifying (5x2 + -11x + -144) = 0 Reorder the terms: (-144 + -11x + 5x2) = 0 Remove parenthesis around (-144 + -11x + 5x2) -144 + -11x + 5x2 = 0 Solving -144 + -11x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -28.8 + -2.2x + x2 = 0 Move the constant term to the right: Add '28.8' to each side of the equation. -28.8 + -2.2x + 28.8 + x2 = 0 + 28.8 Reorder the terms: -28.8 + 28.8 + -2.2x + x2 = 0 + 28.8 Combine like terms: -28.8 + 28.8 = 0.0 0.0 + -2.2x + x2 = 0 + 28.8 -2.2x + x2 = 0 + 28.8 Combine like terms: 0 + 28.8 = 28.8 -2.2x + x2 = 28.8 The x term is -2.2x. Take half its coefficient (-1.1). Square it (1.21) and add it to both sides. Add '1.21' to each side of the equation. -2.2x + 1.21 + x2 = 28.8 + 1.21 Reorder the terms: 1.21 + -2.2x + x2 = 28.8 + 1.21 Combine like terms: 28.8 + 1.21 = 30.01 1.21 + -2.2x + x2 = 30.01 Factor a perfect square on the left side: (x + -1.1)(x + -1.1) = 30.01 Calculate the square root of the right side: 5.47813837 Break this problem into two subproblems by setting (x + -1.1) equal to 5.47813837 and -5.47813837.Subproblem 1
x + -1.1 = 5.47813837 Simplifying x + -1.1 = 5.47813837 Reorder the terms: -1.1 + x = 5.47813837 Solving -1.1 + x = 5.47813837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = 5.47813837 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = 5.47813837 + 1.1 x = 5.47813837 + 1.1 Combine like terms: 5.47813837 + 1.1 = 6.57813837 x = 6.57813837 Simplifying x = 6.57813837Subproblem 2
x + -1.1 = -5.47813837 Simplifying x + -1.1 = -5.47813837 Reorder the terms: -1.1 + x = -5.47813837 Solving -1.1 + x = -5.47813837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = -5.47813837 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = -5.47813837 + 1.1 x = -5.47813837 + 1.1 Combine like terms: -5.47813837 + 1.1 = -4.37813837 x = -4.37813837 Simplifying x = -4.37813837Solution
The solution to the problem is based on the solutions from the subproblems. x = {6.57813837, -4.37813837}
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