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Simplifying 90x2 + -90x + -10 = 0 Reorder the terms: -10 + -90x + 90x2 = 0 Solving -10 + -90x + 90x2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '10'. 10(-1 + -9x + 9x2) = 0 Ignore the factor 10.Subproblem 1
Set the factor '(-1 + -9x + 9x2)' equal to zero and attempt to solve: Simplifying -1 + -9x + 9x2 = 0 Solving -1 + -9x + 9x2 = 0 Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. -0.1111111111 + -1x + x2 = 0 Move the constant term to the right: Add '0.1111111111' to each side of the equation. -0.1111111111 + -1x + 0.1111111111 + x2 = 0 + 0.1111111111 Reorder the terms: -0.1111111111 + 0.1111111111 + -1x + x2 = 0 + 0.1111111111 Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000 0.0000000000 + -1x + x2 = 0 + 0.1111111111 -1x + x2 = 0 + 0.1111111111 Combine like terms: 0 + 0.1111111111 = 0.1111111111 -1x + x2 = 0.1111111111 The x term is -1x. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1x + 0.25 + x2 = 0.1111111111 + 0.25 Reorder the terms: 0.25 + -1x + x2 = 0.1111111111 + 0.25 Combine like terms: 0.1111111111 + 0.25 = 0.3611111111 0.25 + -1x + x2 = 0.3611111111 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = 0.3611111111 Calculate the square root of the right side: 0.600925213 Break this problem into two subproblems by setting (x + -0.5) equal to 0.600925213 and -0.600925213.Subproblem 1
x + -0.5 = 0.600925213 Simplifying x + -0.5 = 0.600925213 Reorder the terms: -0.5 + x = 0.600925213 Solving -0.5 + x = 0.600925213 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.600925213 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.600925213 + 0.5 x = 0.600925213 + 0.5 Combine like terms: 0.600925213 + 0.5 = 1.100925213 x = 1.100925213 Simplifying x = 1.100925213Subproblem 2
x + -0.5 = -0.600925213 Simplifying x + -0.5 = -0.600925213 Reorder the terms: -0.5 + x = -0.600925213 Solving -0.5 + x = -0.600925213 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -0.600925213 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.600925213 + 0.5 x = -0.600925213 + 0.5 Combine like terms: -0.600925213 + 0.5 = -0.100925213 x = -0.100925213 Simplifying x = -0.100925213Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.100925213, -0.100925213}Solution
x = {1.100925213, -0.100925213}
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