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Simplifying 7x2 + -25x + -10 = 0 Reorder the terms: -10 + -25x + 7x2 = 0 Solving -10 + -25x + 7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. -1.428571429 + -3.571428571x + x2 = 0 Move the constant term to the right: Add '1.428571429' to each side of the equation. -1.428571429 + -3.571428571x + 1.428571429 + x2 = 0 + 1.428571429 Reorder the terms: -1.428571429 + 1.428571429 + -3.571428571x + x2 = 0 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + -3.571428571x + x2 = 0 + 1.428571429 -3.571428571x + x2 = 0 + 1.428571429 Combine like terms: 0 + 1.428571429 = 1.428571429 -3.571428571x + x2 = 1.428571429 The x term is -3.571428571x. Take half its coefficient (-1.785714286). Square it (3.188775511) and add it to both sides. Add '3.188775511' to each side of the equation. -3.571428571x + 3.188775511 + x2 = 1.428571429 + 3.188775511 Reorder the terms: 3.188775511 + -3.571428571x + x2 = 1.428571429 + 3.188775511 Combine like terms: 1.428571429 + 3.188775511 = 4.61734694 3.188775511 + -3.571428571x + x2 = 4.61734694 Factor a perfect square on the left side: (x + -1.785714286)(x + -1.785714286) = 4.61734694 Calculate the square root of the right side: 2.14880128 Break this problem into two subproblems by setting (x + -1.785714286) equal to 2.14880128 and -2.14880128.Subproblem 1
x + -1.785714286 = 2.14880128 Simplifying x + -1.785714286 = 2.14880128 Reorder the terms: -1.785714286 + x = 2.14880128 Solving -1.785714286 + x = 2.14880128 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.785714286' to each side of the equation. -1.785714286 + 1.785714286 + x = 2.14880128 + 1.785714286 Combine like terms: -1.785714286 + 1.785714286 = 0.000000000 0.000000000 + x = 2.14880128 + 1.785714286 x = 2.14880128 + 1.785714286 Combine like terms: 2.14880128 + 1.785714286 = 3.934515566 x = 3.934515566 Simplifying x = 3.934515566Subproblem 2
x + -1.785714286 = -2.14880128 Simplifying x + -1.785714286 = -2.14880128 Reorder the terms: -1.785714286 + x = -2.14880128 Solving -1.785714286 + x = -2.14880128 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.785714286' to each side of the equation. -1.785714286 + 1.785714286 + x = -2.14880128 + 1.785714286 Combine like terms: -1.785714286 + 1.785714286 = 0.000000000 0.000000000 + x = -2.14880128 + 1.785714286 x = -2.14880128 + 1.785714286 Combine like terms: -2.14880128 + 1.785714286 = -0.363086994 x = -0.363086994 Simplifying x = -0.363086994Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.934515566, -0.363086994}
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