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Simplifying 2x2 + 28x + -19 = 0 Reorder the terms: -19 + 28x + 2x2 = 0 Solving -19 + 28x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -9.5 + 14x + x2 = 0 Move the constant term to the right: Add '9.5' to each side of the equation. -9.5 + 14x + 9.5 + x2 = 0 + 9.5 Reorder the terms: -9.5 + 9.5 + 14x + x2 = 0 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + 14x + x2 = 0 + 9.5 14x + x2 = 0 + 9.5 Combine like terms: 0 + 9.5 = 9.5 14x + x2 = 9.5 The x term is 14x. Take half its coefficient (7). Square it (49) and add it to both sides. Add '49' to each side of the equation. 14x + 49 + x2 = 9.5 + 49 Reorder the terms: 49 + 14x + x2 = 9.5 + 49 Combine like terms: 9.5 + 49 = 58.5 49 + 14x + x2 = 58.5 Factor a perfect square on the left side: (x + 7)(x + 7) = 58.5 Calculate the square root of the right side: 7.64852927 Break this problem into two subproblems by setting (x + 7) equal to 7.64852927 and -7.64852927.Subproblem 1
x + 7 = 7.64852927 Simplifying x + 7 = 7.64852927 Reorder the terms: 7 + x = 7.64852927 Solving 7 + x = 7.64852927 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 7.64852927 + -7 Combine like terms: 7 + -7 = 0 0 + x = 7.64852927 + -7 x = 7.64852927 + -7 Combine like terms: 7.64852927 + -7 = 0.64852927 x = 0.64852927 Simplifying x = 0.64852927Subproblem 2
x + 7 = -7.64852927 Simplifying x + 7 = -7.64852927 Reorder the terms: 7 + x = -7.64852927 Solving 7 + x = -7.64852927 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = -7.64852927 + -7 Combine like terms: 7 + -7 = 0 0 + x = -7.64852927 + -7 x = -7.64852927 + -7 Combine like terms: -7.64852927 + -7 = -14.64852927 x = -14.64852927 Simplifying x = -14.64852927Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.64852927, -14.64852927}
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