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Simplifying (2x2 + 7x + 1) + -1(8x2 + x) = 0 Reorder the terms: (1 + 7x + 2x2) + -1(8x2 + x) = 0 Remove parenthesis around (1 + 7x + 2x2) 1 + 7x + 2x2 + -1(8x2 + x) = 0 Reorder the terms: 1 + 7x + 2x2 + -1(x + 8x2) = 0 1 + 7x + 2x2 + (x * -1 + 8x2 * -1) = 0 1 + 7x + 2x2 + (-1x + -8x2) = 0 Reorder the terms: 1 + 7x + -1x + 2x2 + -8x2 = 0 Combine like terms: 7x + -1x = 6x 1 + 6x + 2x2 + -8x2 = 0 Combine like terms: 2x2 + -8x2 = -6x2 1 + 6x + -6x2 = 0 Solving 1 + 6x + -6x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -6 the coefficient of the squared term: Divide each side by '-6'. -0.1666666667 + -1x + x2 = 0 Move the constant term to the right: Add '0.1666666667' to each side of the equation. -0.1666666667 + -1x + 0.1666666667 + x2 = 0 + 0.1666666667 Reorder the terms: -0.1666666667 + 0.1666666667 + -1x + x2 = 0 + 0.1666666667 Combine like terms: -0.1666666667 + 0.1666666667 = 0.0000000000 0.0000000000 + -1x + x2 = 0 + 0.1666666667 -1x + x2 = 0 + 0.1666666667 Combine like terms: 0 + 0.1666666667 = 0.1666666667 -1x + x2 = 0.1666666667 The x term is -1x. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1x + 0.25 + x2 = 0.1666666667 + 0.25 Reorder the terms: 0.25 + -1x + x2 = 0.1666666667 + 0.25 Combine like terms: 0.1666666667 + 0.25 = 0.4166666667 0.25 + -1x + x2 = 0.4166666667 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = 0.4166666667 Calculate the square root of the right side: 0.645497224 Break this problem into two subproblems by setting (x + -0.5) equal to 0.645497224 and -0.645497224.Subproblem 1
x + -0.5 = 0.645497224 Simplifying x + -0.5 = 0.645497224 Reorder the terms: -0.5 + x = 0.645497224 Solving -0.5 + x = 0.645497224 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 0.645497224 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 0.645497224 + 0.5 x = 0.645497224 + 0.5 Combine like terms: 0.645497224 + 0.5 = 1.145497224 x = 1.145497224 Simplifying x = 1.145497224Subproblem 2
x + -0.5 = -0.645497224 Simplifying x + -0.5 = -0.645497224 Reorder the terms: -0.5 + x = -0.645497224 Solving -0.5 + x = -0.645497224 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -0.645497224 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -0.645497224 + 0.5 x = -0.645497224 + 0.5 Combine like terms: -0.645497224 + 0.5 = -0.145497224 x = -0.145497224 Simplifying x = -0.145497224Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.145497224, -0.145497224}
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