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Simplifying 25x2 + 30x + 7 = 0 Reorder the terms: 7 + 30x + 25x2 = 0 Solving 7 + 30x + 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'. 0.28 + 1.2x + x2 = 0 Move the constant term to the right: Add '-0.28' to each side of the equation. 0.28 + 1.2x + -0.28 + x2 = 0 + -0.28 Reorder the terms: 0.28 + -0.28 + 1.2x + x2 = 0 + -0.28 Combine like terms: 0.28 + -0.28 = 0.00 0.00 + 1.2x + x2 = 0 + -0.28 1.2x + x2 = 0 + -0.28 Combine like terms: 0 + -0.28 = -0.28 1.2x + x2 = -0.28 The x term is 1.2x. Take half its coefficient (0.6). Square it (0.36) and add it to both sides. Add '0.36' to each side of the equation. 1.2x + 0.36 + x2 = -0.28 + 0.36 Reorder the terms: 0.36 + 1.2x + x2 = -0.28 + 0.36 Combine like terms: -0.28 + 0.36 = 0.08 0.36 + 1.2x + x2 = 0.08 Factor a perfect square on the left side: (x + 0.6)(x + 0.6) = 0.08 Calculate the square root of the right side: 0.282842712 Break this problem into two subproblems by setting (x + 0.6) equal to 0.282842712 and -0.282842712.Subproblem 1
x + 0.6 = 0.282842712 Simplifying x + 0.6 = 0.282842712 Reorder the terms: 0.6 + x = 0.282842712 Solving 0.6 + x = 0.282842712 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 0.282842712 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 0.282842712 + -0.6 x = 0.282842712 + -0.6 Combine like terms: 0.282842712 + -0.6 = -0.317157288 x = -0.317157288 Simplifying x = -0.317157288Subproblem 2
x + 0.6 = -0.282842712 Simplifying x + 0.6 = -0.282842712 Reorder the terms: 0.6 + x = -0.282842712 Solving 0.6 + x = -0.282842712 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -0.282842712 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -0.282842712 + -0.6 x = -0.282842712 + -0.6 Combine like terms: -0.282842712 + -0.6 = -0.882842712 x = -0.882842712 Simplifying x = -0.882842712Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.317157288, -0.882842712}
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