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Simplifying 218.75 = 35x + -0.7x2 Solving 218.75 = 35x + -0.7x2 Solving for variable 'x'. Reorder the terms: 218.75 + -35x + 0.7x2 = 35x + -35x + -0.7x2 + 0.7x2 Combine like terms: 35x + -35x = 0 218.75 + -35x + 0.7x2 = 0 + -0.7x2 + 0.7x2 218.75 + -35x + 0.7x2 = -0.7x2 + 0.7x2 Combine like terms: -0.7x2 + 0.7x2 = 0.0 218.75 + -35x + 0.7x2 = 0.0 Begin completing the square. Divide all terms by 0.7 the coefficient of the squared term: Divide each side by '0.7'. 312.5 + -50x + x2 = 0 Move the constant term to the right: Add '-312.5' to each side of the equation. 312.5 + -50x + -312.5 + x2 = 0 + -312.5 Reorder the terms: 312.5 + -312.5 + -50x + x2 = 0 + -312.5 Combine like terms: 312.5 + -312.5 = 0.0 0.0 + -50x + x2 = 0 + -312.5 -50x + x2 = 0 + -312.5 Combine like terms: 0 + -312.5 = -312.5 -50x + x2 = -312.5 The x term is -50x. Take half its coefficient (-25). Square it (625) and add it to both sides. Add '625' to each side of the equation. -50x + 625 + x2 = -312.5 + 625 Reorder the terms: 625 + -50x + x2 = -312.5 + 625 Combine like terms: -312.5 + 625 = 312.5 625 + -50x + x2 = 312.5 Factor a perfect square on the left side: (x + -25)(x + -25) = 312.5 Calculate the square root of the right side: 17.67766953 Break this problem into two subproblems by setting (x + -25) equal to 17.67766953 and -17.67766953.Subproblem 1
x + -25 = 17.67766953 Simplifying x + -25 = 17.67766953 Reorder the terms: -25 + x = 17.67766953 Solving -25 + x = 17.67766953 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = 17.67766953 + 25 Combine like terms: -25 + 25 = 0 0 + x = 17.67766953 + 25 x = 17.67766953 + 25 Combine like terms: 17.67766953 + 25 = 42.67766953 x = 42.67766953 Simplifying x = 42.67766953Subproblem 2
x + -25 = -17.67766953 Simplifying x + -25 = -17.67766953 Reorder the terms: -25 + x = -17.67766953 Solving -25 + x = -17.67766953 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = -17.67766953 + 25 Combine like terms: -25 + 25 = 0 0 + x = -17.67766953 + 25 x = -17.67766953 + 25 Combine like terms: -17.67766953 + 25 = 7.32233047 x = 7.32233047 Simplifying x = 7.32233047Solution
The solution to the problem is based on the solutions from the subproblems. x = {42.67766953, 7.32233047}
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