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Simplifying 9x + 16 = 8x2 Reorder the terms: 16 + 9x = 8x2 Solving 16 + 9x = 8x2 Solving for variable 'x'. Combine like terms: 8x2 + -8x2 = 0 16 + 9x + -8x2 = 0 Begin completing the square. Divide all terms by -8 the coefficient of the squared term: Divide each side by '-8'. -2 + -1.125x + x2 = 0 Move the constant term to the right: Add '2' to each side of the equation. -2 + -1.125x + 2 + x2 = 0 + 2 Reorder the terms: -2 + 2 + -1.125x + x2 = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1.125x + x2 = 0 + 2 -1.125x + x2 = 0 + 2 Combine like terms: 0 + 2 = 2 -1.125x + x2 = 2 The x term is -1.125x. Take half its coefficient (-0.5625). Square it (0.31640625) and add it to both sides. Add '0.31640625' to each side of the equation. -1.125x + 0.31640625 + x2 = 2 + 0.31640625 Reorder the terms: 0.31640625 + -1.125x + x2 = 2 + 0.31640625 Combine like terms: 2 + 0.31640625 = 2.31640625 0.31640625 + -1.125x + x2 = 2.31640625 Factor a perfect square on the left side: (x + -0.5625)(x + -0.5625) = 2.31640625 Calculate the square root of the right side: 1.521974458 Break this problem into two subproblems by setting (x + -0.5625) equal to 1.521974458 and -1.521974458.Subproblem 1
x + -0.5625 = 1.521974458 Simplifying x + -0.5625 = 1.521974458 Reorder the terms: -0.5625 + x = 1.521974458 Solving -0.5625 + x = 1.521974458 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = 1.521974458 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = 1.521974458 + 0.5625 x = 1.521974458 + 0.5625 Combine like terms: 1.521974458 + 0.5625 = 2.084474458 x = 2.084474458 Simplifying x = 2.084474458Subproblem 2
x + -0.5625 = -1.521974458 Simplifying x + -0.5625 = -1.521974458 Reorder the terms: -0.5625 + x = -1.521974458 Solving -0.5625 + x = -1.521974458 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = -1.521974458 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = -1.521974458 + 0.5625 x = -1.521974458 + 0.5625 Combine like terms: -1.521974458 + 0.5625 = -0.959474458 x = -0.959474458 Simplifying x = -0.959474458Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.084474458, -0.959474458}
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