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Simplifying 7x + -10x = 6x2 + -21 Combine like terms: 7x + -10x = -3x -3x = 6x2 + -21 Reorder the terms: -3x = -21 + 6x2 Solving -3x = -21 + 6x2 Solving for variable 'x'. Reorder the terms: 21 + -3x + -6x2 = -21 + 6x2 + 21 + -6x2 Reorder the terms: 21 + -3x + -6x2 = -21 + 21 + 6x2 + -6x2 Combine like terms: -21 + 21 = 0 21 + -3x + -6x2 = 0 + 6x2 + -6x2 21 + -3x + -6x2 = 6x2 + -6x2 Combine like terms: 6x2 + -6x2 = 0 21 + -3x + -6x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(7 + -1x + -2x2) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(7 + -1x + -2x2)' equal to zero and attempt to solve: Simplifying 7 + -1x + -2x2 = 0 Solving 7 + -1x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -3.5 + 0.5x + x2 = 0 Move the constant term to the right: Add '3.5' to each side of the equation. -3.5 + 0.5x + 3.5 + x2 = 0 + 3.5 Reorder the terms: -3.5 + 3.5 + 0.5x + x2 = 0 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + 0.5x + x2 = 0 + 3.5 0.5x + x2 = 0 + 3.5 Combine like terms: 0 + 3.5 = 3.5 0.5x + x2 = 3.5 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 = 3.5 + 0.0625 Reorder the terms: 0.0625 + 0.5x + x2 = 3.5 + 0.0625 Combine like terms: 3.5 + 0.0625 = 3.5625 0.0625 + 0.5x + x2 = 3.5625 Factor a perfect square on the left side: (x + 0.25)(x + 0.25) = 3.5625 Calculate the square root of the right side: 1.887458609 Break this problem into two subproblems by setting (x + 0.25) equal to 1.887458609 and -1.887458609.Subproblem 1
x + 0.25 = 1.887458609 Simplifying x + 0.25 = 1.887458609 Reorder the terms: 0.25 + x = 1.887458609 Solving 0.25 + x = 1.887458609 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 = 1.887458609 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 1.887458609 + -0.25 x = 1.887458609 + -0.25 Combine like terms: 1.887458609 + -0.25 = 1.637458609 x = 1.637458609 Simplifying x = 1.637458609Subproblem 2
x + 0.25 = -1.887458609 Simplifying x + 0.25 = -1.887458609 Reorder the terms: 0.25 + x = -1.887458609 Solving 0.25 + x = -1.887458609 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 = -1.887458609 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -1.887458609 + -0.25 x = -1.887458609 + -0.25 Combine like terms: -1.887458609 + -0.25 = -2.137458609 x = -2.137458609 Simplifying x = -2.137458609Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.637458609, -2.137458609}Solution
x = {1.637458609, -2.137458609}
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