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Simplifying 4x2 + 13x + 9 = 4 Reorder the terms: 9 + 13x + 4x2 = 4 Solving 9 + 13x + 4x2 = 4 Solving for variable 'x'. Reorder the terms: 9 + -4 + 13x + 4x2 = 4 + -4 Combine like terms: 9 + -4 = 5 5 + 13x + 4x2 = 4 + -4 Combine like terms: 4 + -4 = 0 5 + 13x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 1.25 + 3.25x + x2 = 0 Move the constant term to the right: Add '-1.25' to each side of the equation. 1.25 + 3.25x + -1.25 + x2 = 0 + -1.25 Reorder the terms: 1.25 + -1.25 + 3.25x + x2 = 0 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + 3.25x + x2 = 0 + -1.25 3.25x + x2 = 0 + -1.25 Combine like terms: 0 + -1.25 = -1.25 3.25x + x2 = -1.25 The x term is 3.25x. Take half its coefficient (1.625). Square it (2.640625) and add it to both sides. Add '2.640625' to each side of the equation. 3.25x + 2.640625 + x2 = -1.25 + 2.640625 Reorder the terms: 2.640625 + 3.25x + x2 = -1.25 + 2.640625 Combine like terms: -1.25 + 2.640625 = 1.390625 2.640625 + 3.25x + x2 = 1.390625 Factor a perfect square on the left side: (x + 1.625)(x + 1.625) = 1.390625 Calculate the square root of the right side: 1.179247642 Break this problem into two subproblems by setting (x + 1.625) equal to 1.179247642 and -1.179247642.Subproblem 1
x + 1.625 = 1.179247642 Simplifying x + 1.625 = 1.179247642 Reorder the terms: 1.625 + x = 1.179247642 Solving 1.625 + x = 1.179247642 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + x = 1.179247642 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + x = 1.179247642 + -1.625 x = 1.179247642 + -1.625 Combine like terms: 1.179247642 + -1.625 = -0.445752358 x = -0.445752358 Simplifying x = -0.445752358Subproblem 2
x + 1.625 = -1.179247642 Simplifying x + 1.625 = -1.179247642 Reorder the terms: 1.625 + x = -1.179247642 Solving 1.625 + x = -1.179247642 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + x = -1.179247642 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + x = -1.179247642 + -1.625 x = -1.179247642 + -1.625 Combine like terms: -1.179247642 + -1.625 = -2.804247642 x = -2.804247642 Simplifying x = -2.804247642Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.445752358, -2.804247642}
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