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Simplifying 30x2 + -15x = 20 Reorder the terms: -15x + 30x2 = 20 Solving -15x + 30x2 = 20 Solving for variable 'x'. Reorder the terms: -20 + -15x + 30x2 = 20 + -20 Combine like terms: 20 + -20 = 0 -20 + -15x + 30x2 = 0 Factor out the Greatest Common Factor (GCF), '5'. 5(-4 + -3x + 6x2) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-4 + -3x + 6x2)' equal to zero and attempt to solve: Simplifying -4 + -3x + 6x2 = 0 Solving -4 + -3x + 6x2 = 0 Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -0.6666666667 + -0.5x + x2 = 0 Move the constant term to the right: Add '0.6666666667' to each side of the equation. -0.6666666667 + -0.5x + 0.6666666667 + x2 = 0 + 0.6666666667 Reorder the terms: -0.6666666667 + 0.6666666667 + -0.5x + x2 = 0 + 0.6666666667 Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000 0.0000000000 + -0.5x + x2 = 0 + 0.6666666667 -0.5x + x2 = 0 + 0.6666666667 Combine like terms: 0 + 0.6666666667 = 0.6666666667 -0.5x + x2 = 0.6666666667 The x term is -0.5x. Take half its coefficient (-0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. -0.5x + 0.0625 + x2 = 0.6666666667 + 0.0625 Reorder the terms: 0.0625 + -0.5x + x2 = 0.6666666667 + 0.0625 Combine like terms: 0.6666666667 + 0.0625 = 0.7291666667 0.0625 + -0.5x + x2 = 0.7291666667 Factor a perfect square on the left side: (x + -0.25)(x + -0.25) = 0.7291666667 Calculate the square root of the right side: 0.853912564 Break this problem into two subproblems by setting (x + -0.25) equal to 0.853912564 and -0.853912564.Subproblem 1
x + -0.25 = 0.853912564 Simplifying x + -0.25 = 0.853912564 Reorder the terms: -0.25 + x = 0.853912564 Solving -0.25 + x = 0.853912564 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 0.853912564 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 0.853912564 + 0.25 x = 0.853912564 + 0.25 Combine like terms: 0.853912564 + 0.25 = 1.103912564 x = 1.103912564 Simplifying x = 1.103912564Subproblem 2
x + -0.25 = -0.853912564 Simplifying x + -0.25 = -0.853912564 Reorder the terms: -0.25 + x = -0.853912564 Solving -0.25 + x = -0.853912564 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -0.853912564 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -0.853912564 + 0.25 x = -0.853912564 + 0.25 Combine like terms: -0.853912564 + 0.25 = -0.603912564 x = -0.603912564 Simplifying x = -0.603912564Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.103912564, -0.603912564}Solution
x = {1.103912564, -0.603912564}
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