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Simplifying 2x2 + -18x + 20 = 0 Reorder the terms: 20 + -18x + 2x2 = 0 Solving 20 + -18x + 2x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '2'. 2(10 + -9x + x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(10 + -9x + x2)' equal to zero and attempt to solve: Simplifying 10 + -9x + x2 = 0 Solving 10 + -9x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-10' to each side of the equation. 10 + -9x + -10 + x2 = 0 + -10 Reorder the terms: 10 + -10 + -9x + x2 = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -9x + x2 = 0 + -10 -9x + x2 = 0 + -10 Combine like terms: 0 + -10 = -10 -9x + x2 = -10 The x term is -9x. Take half its coefficient (-4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. -9x + 20.25 + x2 = -10 + 20.25 Reorder the terms: 20.25 + -9x + x2 = -10 + 20.25 Combine like terms: -10 + 20.25 = 10.25 20.25 + -9x + x2 = 10.25 Factor a perfect square on the left side: (x + -4.5)(x + -4.5) = 10.25 Calculate the square root of the right side: 3.201562119 Break this problem into two subproblems by setting (x + -4.5) equal to 3.201562119 and -3.201562119.Subproblem 1
x + -4.5 = 3.201562119 Simplifying x + -4.5 = 3.201562119 Reorder the terms: -4.5 + x = 3.201562119 Solving -4.5 + x = 3.201562119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = 3.201562119 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = 3.201562119 + 4.5 x = 3.201562119 + 4.5 Combine like terms: 3.201562119 + 4.5 = 7.701562119 x = 7.701562119 Simplifying x = 7.701562119Subproblem 2
x + -4.5 = -3.201562119 Simplifying x + -4.5 = -3.201562119 Reorder the terms: -4.5 + x = -3.201562119 Solving -4.5 + x = -3.201562119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + x = -3.201562119 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + x = -3.201562119 + 4.5 x = -3.201562119 + 4.5 Combine like terms: -3.201562119 + 4.5 = 1.298437881 x = 1.298437881 Simplifying x = 1.298437881Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.701562119, 1.298437881}Solution
x = {7.701562119, 1.298437881}
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