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Simplifying x2 + -12x + -91 = 0 Reorder the terms: -91 + -12x + x2 = 0 Solving -91 + -12x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '91' to each side of the equation. -91 + -12x + 91 + x2 = 0 + 91 Reorder the terms: -91 + 91 + -12x + x2 = 0 + 91 Combine like terms: -91 + 91 = 0 0 + -12x + x2 = 0 + 91 -12x + x2 = 0 + 91 Combine like terms: 0 + 91 = 91 -12x + x2 = 91 The x term is -12x. Take half its coefficient (-6). Square it (36) and add it to both sides. Add '36' to each side of the equation. -12x + 36 + x2 = 91 + 36 Reorder the terms: 36 + -12x + x2 = 91 + 36 Combine like terms: 91 + 36 = 127 36 + -12x + x2 = 127 Factor a perfect square on the left side: (x + -6)(x + -6) = 127 Calculate the square root of the right side: 11.26942767 Break this problem into two subproblems by setting (x + -6) equal to 11.26942767 and -11.26942767.Subproblem 1
x + -6 = 11.26942767 Simplifying x + -6 = 11.26942767 Reorder the terms: -6 + x = 11.26942767 Solving -6 + x = 11.26942767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 11.26942767 + 6 Combine like terms: -6 + 6 = 0 0 + x = 11.26942767 + 6 x = 11.26942767 + 6 Combine like terms: 11.26942767 + 6 = 17.26942767 x = 17.26942767 Simplifying x = 17.26942767Subproblem 2
x + -6 = -11.26942767 Simplifying x + -6 = -11.26942767 Reorder the terms: -6 + x = -11.26942767 Solving -6 + x = -11.26942767 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -11.26942767 + 6 Combine like terms: -6 + 6 = 0 0 + x = -11.26942767 + 6 x = -11.26942767 + 6 Combine like terms: -11.26942767 + 6 = -5.26942767 x = -5.26942767 Simplifying x = -5.26942767Solution
The solution to the problem is based on the solutions from the subproblems. x = {17.26942767, -5.26942767}
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