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Simplifying 4x2 + 11x + -7 = 0 Reorder the terms: -7 + 11x + 4x2 = 0 Solving -7 + 11x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -1.75 + 2.75x + x2 = 0 Move the constant term to the right: Add '1.75' to each side of the equation. -1.75 + 2.75x + 1.75 + x2 = 0 + 1.75 Reorder the terms: -1.75 + 1.75 + 2.75x + x2 = 0 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + 2.75x + x2 = 0 + 1.75 2.75x + x2 = 0 + 1.75 Combine like terms: 0 + 1.75 = 1.75 2.75x + x2 = 1.75 The x term is 2.75x. Take half its coefficient (1.375). Square it (1.890625) and add it to both sides. Add '1.890625' to each side of the equation. 2.75x + 1.890625 + x2 = 1.75 + 1.890625 Reorder the terms: 1.890625 + 2.75x + x2 = 1.75 + 1.890625 Combine like terms: 1.75 + 1.890625 = 3.640625 1.890625 + 2.75x + x2 = 3.640625 Factor a perfect square on the left side: (x + 1.375)(x + 1.375) = 3.640625 Calculate the square root of the right side: 1.90804219 Break this problem into two subproblems by setting (x + 1.375) equal to 1.90804219 and -1.90804219.Subproblem 1
x + 1.375 = 1.90804219 Simplifying x + 1.375 = 1.90804219 Reorder the terms: 1.375 + x = 1.90804219 Solving 1.375 + x = 1.90804219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + x = 1.90804219 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = 1.90804219 + -1.375 x = 1.90804219 + -1.375 Combine like terms: 1.90804219 + -1.375 = 0.53304219 x = 0.53304219 Simplifying x = 0.53304219Subproblem 2
x + 1.375 = -1.90804219 Simplifying x + 1.375 = -1.90804219 Reorder the terms: 1.375 + x = -1.90804219 Solving 1.375 + x = -1.90804219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + x = -1.90804219 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = -1.90804219 + -1.375 x = -1.90804219 + -1.375 Combine like terms: -1.90804219 + -1.375 = -3.28304219 x = -3.28304219 Simplifying x = -3.28304219Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.53304219, -3.28304219}
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