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Simplifying 7 + 5x(x + 2) = 10 Reorder the terms: 7 + 5x(2 + x) = 10 7 + (2 * 5x + x * 5x) = 10 7 + (10x + 5x2) = 10 Solving 7 + 10x + 5x2 = 10 Solving for variable 'x'. Reorder the terms: 7 + -10 + 10x + 5x2 = 10 + -10 Combine like terms: 7 + -10 = -3 -3 + 10x + 5x2 = 10 + -10 Combine like terms: 10 + -10 = 0 -3 + 10x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -0.6 + 2x + x2 = 0 Move the constant term to the right: Add '0.6' to each side of the equation. -0.6 + 2x + 0.6 + x2 = 0 + 0.6 Reorder the terms: -0.6 + 0.6 + 2x + x2 = 0 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + 2x + x2 = 0 + 0.6 2x + x2 = 0 + 0.6 Combine like terms: 0 + 0.6 = 0.6 2x + x2 = 0.6 The x term is 2x. Take half its coefficient (1). Square it (1) and add it to both sides. Add '1' to each side of the equation. 2x + 1 + x2 = 0.6 + 1 Reorder the terms: 1 + 2x + x2 = 0.6 + 1 Combine like terms: 0.6 + 1 = 1.6 1 + 2x + x2 = 1.6 Factor a perfect square on the left side: (x + 1)(x + 1) = 1.6 Calculate the square root of the right side: 1.264911064 Break this problem into two subproblems by setting (x + 1) equal to 1.264911064 and -1.264911064.Subproblem 1
x + 1 = 1.264911064 Simplifying x + 1 = 1.264911064 Reorder the terms: 1 + x = 1.264911064 Solving 1 + x = 1.264911064 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.264911064 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.264911064 + -1 x = 1.264911064 + -1 Combine like terms: 1.264911064 + -1 = 0.264911064 x = 0.264911064 Simplifying x = 0.264911064Subproblem 2
x + 1 = -1.264911064 Simplifying x + 1 = -1.264911064 Reorder the terms: 1 + x = -1.264911064 Solving 1 + x = -1.264911064 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.264911064 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.264911064 + -1 x = -1.264911064 + -1 Combine like terms: -1.264911064 + -1 = -2.264911064 x = -2.264911064 Simplifying x = -2.264911064Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.264911064, -2.264911064}
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