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Simplifying 4x2 + 28x = 45 Reorder the terms: 28x + 4x2 = 45 Solving 28x + 4x2 = 45 Solving for variable 'x'. Reorder the terms: -45 + 28x + 4x2 = 45 + -45 Combine like terms: 45 + -45 = 0 -45 + 28x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -11.25 + 7x + x2 = 0 Move the constant term to the right: Add '11.25' to each side of the equation. -11.25 + 7x + 11.25 + x2 = 0 + 11.25 Reorder the terms: -11.25 + 11.25 + 7x + x2 = 0 + 11.25 Combine like terms: -11.25 + 11.25 = 0.00 0.00 + 7x + x2 = 0 + 11.25 7x + x2 = 0 + 11.25 Combine like terms: 0 + 11.25 = 11.25 7x + x2 = 11.25 The x term is 7x. Take half its coefficient (3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. 7x + 12.25 + x2 = 11.25 + 12.25 Reorder the terms: 12.25 + 7x + x2 = 11.25 + 12.25 Combine like terms: 11.25 + 12.25 = 23.5 12.25 + 7x + x2 = 23.5 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 23.5 Calculate the square root of the right side: 4.847679857 Break this problem into two subproblems by setting (x + 3.5) equal to 4.847679857 and -4.847679857.Subproblem 1
x + 3.5 = 4.847679857 Simplifying x + 3.5 = 4.847679857 Reorder the terms: 3.5 + x = 4.847679857 Solving 3.5 + x = 4.847679857 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 4.847679857 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 4.847679857 + -3.5 x = 4.847679857 + -3.5 Combine like terms: 4.847679857 + -3.5 = 1.347679857 x = 1.347679857 Simplifying x = 1.347679857Subproblem 2
x + 3.5 = -4.847679857 Simplifying x + 3.5 = -4.847679857 Reorder the terms: 3.5 + x = -4.847679857 Solving 3.5 + x = -4.847679857 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -4.847679857 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -4.847679857 + -3.5 x = -4.847679857 + -3.5 Combine like terms: -4.847679857 + -3.5 = -8.347679857 x = -8.347679857 Simplifying x = -8.347679857Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.347679857, -8.347679857}
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