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Simplifying 2x2 + 7x = 17 Reorder the terms: 7x + 2x2 = 17 Solving 7x + 2x2 = 17 Solving for variable 'x'. Reorder the terms: -17 + 7x + 2x2 = 17 + -17 Combine like terms: 17 + -17 = 0 -17 + 7x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -8.5 + 3.5x + x2 = 0 Move the constant term to the right: Add '8.5' to each side of the equation. -8.5 + 3.5x + 8.5 + x2 = 0 + 8.5 Reorder the terms: -8.5 + 8.5 + 3.5x + x2 = 0 + 8.5 Combine like terms: -8.5 + 8.5 = 0.0 0.0 + 3.5x + x2 = 0 + 8.5 3.5x + x2 = 0 + 8.5 Combine like terms: 0 + 8.5 = 8.5 3.5x + x2 = 8.5 The x term is 3.5x. Take half its coefficient (1.75). Square it (3.0625) and add it to both sides. Add '3.0625' to each side of the equation. 3.5x + 3.0625 + x2 = 8.5 + 3.0625 Reorder the terms: 3.0625 + 3.5x + x2 = 8.5 + 3.0625 Combine like terms: 8.5 + 3.0625 = 11.5625 3.0625 + 3.5x + x2 = 11.5625 Factor a perfect square on the left side: (x + 1.75)(x + 1.75) = 11.5625 Calculate the square root of the right side: 3.400367627 Break this problem into two subproblems by setting (x + 1.75) equal to 3.400367627 and -3.400367627.Subproblem 1
x + 1.75 = 3.400367627 Simplifying x + 1.75 = 3.400367627 Reorder the terms: 1.75 + x = 3.400367627 Solving 1.75 + x = 3.400367627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = 3.400367627 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = 3.400367627 + -1.75 x = 3.400367627 + -1.75 Combine like terms: 3.400367627 + -1.75 = 1.650367627 x = 1.650367627 Simplifying x = 1.650367627Subproblem 2
x + 1.75 = -3.400367627 Simplifying x + 1.75 = -3.400367627 Reorder the terms: 1.75 + x = -3.400367627 Solving 1.75 + x = -3.400367627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = -3.400367627 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = -3.400367627 + -1.75 x = -3.400367627 + -1.75 Combine like terms: -3.400367627 + -1.75 = -5.150367627 x = -5.150367627 Simplifying x = -5.150367627Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.650367627, -5.150367627}
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