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Simplifying 5x(4x + 45) = 360 Reorder the terms: 5x(45 + 4x) = 360 (45 * 5x + 4x * 5x) = 360 (225x + 20x2) = 360 Solving 225x + 20x2 = 360 Solving for variable 'x'. Reorder the terms: -360 + 225x + 20x2 = 360 + -360 Combine like terms: 360 + -360 = 0 -360 + 225x + 20x2 = 0 Factor out the Greatest Common Factor (GCF), '5'. 5(-72 + 45x + 4x2) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-72 + 45x + 4x2)' equal to zero and attempt to solve: Simplifying -72 + 45x + 4x2 = 0 Solving -72 + 45x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -18 + 11.25x + x2 = 0 Move the constant term to the right: Add '18' to each side of the equation. -18 + 11.25x + 18 + x2 = 0 + 18 Reorder the terms: -18 + 18 + 11.25x + x2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 11.25x + x2 = 0 + 18 11.25x + x2 = 0 + 18 Combine like terms: 0 + 18 = 18 11.25x + x2 = 18 The x term is 11.25x. Take half its coefficient (5.625). Square it (31.640625) and add it to both sides. Add '31.640625' to each side of the equation. 11.25x + 31.640625 + x2 = 18 + 31.640625 Reorder the terms: 31.640625 + 11.25x + x2 = 18 + 31.640625 Combine like terms: 18 + 31.640625 = 49.640625 31.640625 + 11.25x + x2 = 49.640625 Factor a perfect square on the left side: (x + 5.625)(x + 5.625) = 49.640625 Calculate the square root of the right side: 7.045610336 Break this problem into two subproblems by setting (x + 5.625) equal to 7.045610336 and -7.045610336.Subproblem 1
x + 5.625 = 7.045610336 Simplifying x + 5.625 = 7.045610336 Reorder the terms: 5.625 + x = 7.045610336 Solving 5.625 + x = 7.045610336 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.625' to each side of the equation. 5.625 + -5.625 + x = 7.045610336 + -5.625 Combine like terms: 5.625 + -5.625 = 0.000 0.000 + x = 7.045610336 + -5.625 x = 7.045610336 + -5.625 Combine like terms: 7.045610336 + -5.625 = 1.420610336 x = 1.420610336 Simplifying x = 1.420610336Subproblem 2
x + 5.625 = -7.045610336 Simplifying x + 5.625 = -7.045610336 Reorder the terms: 5.625 + x = -7.045610336 Solving 5.625 + x = -7.045610336 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.625' to each side of the equation. 5.625 + -5.625 + x = -7.045610336 + -5.625 Combine like terms: 5.625 + -5.625 = 0.000 0.000 + x = -7.045610336 + -5.625 x = -7.045610336 + -5.625 Combine like terms: -7.045610336 + -5.625 = -12.670610336 x = -12.670610336 Simplifying x = -12.670610336Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.420610336, -12.670610336}Solution
x = {1.420610336, -12.670610336}
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