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Simplifying 25x2 + 80x + -61 = 0 Reorder the terms: -61 + 80x + 25x2 = 0 Solving -61 + 80x + 25x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 25 the coefficient of the squared term: Divide each side by '25'. -2.44 + 3.2x + x2 = 0 Move the constant term to the right: Add '2.44' to each side of the equation. -2.44 + 3.2x + 2.44 + x2 = 0 + 2.44 Reorder the terms: -2.44 + 2.44 + 3.2x + x2 = 0 + 2.44 Combine like terms: -2.44 + 2.44 = 0.00 0.00 + 3.2x + x2 = 0 + 2.44 3.2x + x2 = 0 + 2.44 Combine like terms: 0 + 2.44 = 2.44 3.2x + x2 = 2.44 The x term is 3.2x. Take half its coefficient (1.6). Square it (2.56) and add it to both sides. Add '2.56' to each side of the equation. 3.2x + 2.56 + x2 = 2.44 + 2.56 Reorder the terms: 2.56 + 3.2x + x2 = 2.44 + 2.56 Combine like terms: 2.44 + 2.56 = 5 2.56 + 3.2x + x2 = 5 Factor a perfect square on the left side: (x + 1.6)(x + 1.6) = 5 Calculate the square root of the right side: 2.236067978 Break this problem into two subproblems by setting (x + 1.6) equal to 2.236067978 and -2.236067978.Subproblem 1
x + 1.6 = 2.236067978 Simplifying x + 1.6 = 2.236067978 Reorder the terms: 1.6 + x = 2.236067978 Solving 1.6 + x = 2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + x = 2.236067978 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + x = 2.236067978 + -1.6 x = 2.236067978 + -1.6 Combine like terms: 2.236067978 + -1.6 = 0.636067978 x = 0.636067978 Simplifying x = 0.636067978Subproblem 2
x + 1.6 = -2.236067978 Simplifying x + 1.6 = -2.236067978 Reorder the terms: 1.6 + x = -2.236067978 Solving 1.6 + x = -2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.6' to each side of the equation. 1.6 + -1.6 + x = -2.236067978 + -1.6 Combine like terms: 1.6 + -1.6 = 0.0 0.0 + x = -2.236067978 + -1.6 x = -2.236067978 + -1.6 Combine like terms: -2.236067978 + -1.6 = -3.836067978 x = -3.836067978 Simplifying x = -3.836067978Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.636067978, -3.836067978}
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