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Simplifying 20x2 + -4x = 8 Reorder the terms: -4x + 20x2 = 8 Solving -4x + 20x2 = 8 Solving for variable 'x'. Reorder the terms: -8 + -4x + 20x2 = 8 + -8 Combine like terms: 8 + -8 = 0 -8 + -4x + 20x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(-2 + -1x + 5x2) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(-2 + -1x + 5x2)' equal to zero and attempt to solve: Simplifying -2 + -1x + 5x2 = 0 Solving -2 + -1x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -0.4 + -0.2x + x2 = 0 Move the constant term to the right: Add '0.4' to each side of the equation. -0.4 + -0.2x + 0.4 + x2 = 0 + 0.4 Reorder the terms: -0.4 + 0.4 + -0.2x + x2 = 0 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + -0.2x + x2 = 0 + 0.4 -0.2x + x2 = 0 + 0.4 Combine like terms: 0 + 0.4 = 0.4 -0.2x + x2 = 0.4 The x term is -0.2x. Take half its coefficient (-0.1). Square it (0.01) and add it to both sides. Add '0.01' to each side of the equation. -0.2x + 0.01 + x2 = 0.4 + 0.01 Reorder the terms: 0.01 + -0.2x + x2 = 0.4 + 0.01 Combine like terms: 0.4 + 0.01 = 0.41 0.01 + -0.2x + x2 = 0.41 Factor a perfect square on the left side: (x + -0.1)(x + -0.1) = 0.41 Calculate the square root of the right side: 0.640312424 Break this problem into two subproblems by setting (x + -0.1) equal to 0.640312424 and -0.640312424.Subproblem 1
x + -0.1 = 0.640312424 Simplifying x + -0.1 = 0.640312424 Reorder the terms: -0.1 + x = 0.640312424 Solving -0.1 + x = 0.640312424 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = 0.640312424 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = 0.640312424 + 0.1 x = 0.640312424 + 0.1 Combine like terms: 0.640312424 + 0.1 = 0.740312424 x = 0.740312424 Simplifying x = 0.740312424Subproblem 2
x + -0.1 = -0.640312424 Simplifying x + -0.1 = -0.640312424 Reorder the terms: -0.1 + x = -0.640312424 Solving -0.1 + x = -0.640312424 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + x = -0.640312424 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + x = -0.640312424 + 0.1 x = -0.640312424 + 0.1 Combine like terms: -0.640312424 + 0.1 = -0.540312424 x = -0.540312424 Simplifying x = -0.540312424Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.740312424, -0.540312424}Solution
x = {0.740312424, -0.540312424}
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