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Simplifying (5x + -2)(5x + -2) = 15 Reorder the terms: (-2 + 5x)(5x + -2) = 15 Reorder the terms: (-2 + 5x)(-2 + 5x) = 15 Multiply (-2 + 5x) * (-2 + 5x) (-2(-2 + 5x) + 5x * (-2 + 5x)) = 15 ((-2 * -2 + 5x * -2) + 5x * (-2 + 5x)) = 15 ((4 + -10x) + 5x * (-2 + 5x)) = 15 (4 + -10x + (-2 * 5x + 5x * 5x)) = 15 (4 + -10x + (-10x + 25x2)) = 15 Combine like terms: -10x + -10x = -20x (4 + -20x + 25x2) = 15 Solving 4 + -20x + 25x2 = 15 Solving for variable 'x'. Reorder the terms: 4 + -15 + -20x + 25x2 = 15 + -15 Combine like terms: 4 + -15 = -11 -11 + -20x + 25x2 = 15 + -15 Combine like terms: 15 + -15 = 0 -11 + -20x + 25x2 = 0 Begin completing the square. Divide all terms by 25 the coefficient of the squared term: Divide each side by '25'. -0.44 + -0.8x + x2 = 0 Move the constant term to the right: Add '0.44' to each side of the equation. -0.44 + -0.8x + 0.44 + x2 = 0 + 0.44 Reorder the terms: -0.44 + 0.44 + -0.8x + x2 = 0 + 0.44 Combine like terms: -0.44 + 0.44 = 0.00 0.00 + -0.8x + x2 = 0 + 0.44 -0.8x + x2 = 0 + 0.44 Combine like terms: 0 + 0.44 = 0.44 -0.8x + x2 = 0.44 The x term is -0.8x. Take half its coefficient (-0.4). Square it (0.16) and add it to both sides. Add '0.16' to each side of the equation. -0.8x + 0.16 + x2 = 0.44 + 0.16 Reorder the terms: 0.16 + -0.8x + x2 = 0.44 + 0.16 Combine like terms: 0.44 + 0.16 = 0.6 0.16 + -0.8x + x2 = 0.6 Factor a perfect square on the left side: (x + -0.4)(x + -0.4) = 0.6 Calculate the square root of the right side: 0.774596669 Break this problem into two subproblems by setting (x + -0.4) equal to 0.774596669 and -0.774596669.Subproblem 1
x + -0.4 = 0.774596669 Simplifying x + -0.4 = 0.774596669 Reorder the terms: -0.4 + x = 0.774596669 Solving -0.4 + x = 0.774596669 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = 0.774596669 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = 0.774596669 + 0.4 x = 0.774596669 + 0.4 Combine like terms: 0.774596669 + 0.4 = 1.174596669 x = 1.174596669 Simplifying x = 1.174596669Subproblem 2
x + -0.4 = -0.774596669 Simplifying x + -0.4 = -0.774596669 Reorder the terms: -0.4 + x = -0.774596669 Solving -0.4 + x = -0.774596669 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = -0.774596669 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = -0.774596669 + 0.4 x = -0.774596669 + 0.4 Combine like terms: -0.774596669 + 0.4 = -0.374596669 x = -0.374596669 Simplifying x = -0.374596669Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.174596669, -0.374596669}
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