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Simplifying 7x + -2x(x + -4) = 5x + 2 Reorder the terms: 7x + -2x(-4 + x) = 5x + 2 7x + (-4 * -2x + x * -2x) = 5x + 2 7x + (8x + -2x2) = 5x + 2 Combine like terms: 7x + 8x = 15x 15x + -2x2 = 5x + 2 Reorder the terms: 15x + -2x2 = 2 + 5x Solving 15x + -2x2 = 2 + 5x Solving for variable 'x'. Reorder the terms: -2 + 15x + -5x + -2x2 = 2 + 5x + -2 + -5x Combine like terms: 15x + -5x = 10x -2 + 10x + -2x2 = 2 + 5x + -2 + -5x Reorder the terms: -2 + 10x + -2x2 = 2 + -2 + 5x + -5x Combine like terms: 2 + -2 = 0 -2 + 10x + -2x2 = 0 + 5x + -5x -2 + 10x + -2x2 = 5x + -5x Combine like terms: 5x + -5x = 0 -2 + 10x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-1 + 5x + -1x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-1 + 5x + -1x2)' equal to zero and attempt to solve: Simplifying -1 + 5x + -1x2 = 0 Solving -1 + 5x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. 1 + -5x + x2 = 0 Move the constant term to the right: Add '-1' to each side of the equation. 1 + -5x + -1 + x2 = 0 + -1 Reorder the terms: 1 + -1 + -5x + x2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -5x + x2 = 0 + -1 -5x + x2 = 0 + -1 Combine like terms: 0 + -1 = -1 -5x + x2 = -1 The x term is -5x. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5x + 6.25 + x2 = -1 + 6.25 Reorder the terms: 6.25 + -5x + x2 = -1 + 6.25 Combine like terms: -1 + 6.25 = 5.25 6.25 + -5x + x2 = 5.25 Factor a perfect square on the left side: (x + -2.5)(x + -2.5) = 5.25 Calculate the square root of the right side: 2.291287847 Break this problem into two subproblems by setting (x + -2.5) equal to 2.291287847 and -2.291287847.Subproblem 1
x + -2.5 = 2.291287847 Simplifying x + -2.5 = 2.291287847 Reorder the terms: -2.5 + x = 2.291287847 Solving -2.5 + x = 2.291287847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.291287847 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.291287847 + 2.5 x = 2.291287847 + 2.5 Combine like terms: 2.291287847 + 2.5 = 4.791287847 x = 4.791287847 Simplifying x = 4.791287847Subproblem 2
x + -2.5 = -2.291287847 Simplifying x + -2.5 = -2.291287847 Reorder the terms: -2.5 + x = -2.291287847 Solving -2.5 + x = -2.291287847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.291287847 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.291287847 + 2.5 x = -2.291287847 + 2.5 Combine like terms: -2.291287847 + 2.5 = 0.208712153 x = 0.208712153 Simplifying x = 0.208712153Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.791287847, 0.208712153}Solution
x = {4.791287847, 0.208712153}
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