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Simplifying f(0) = -6x2 + 6x + 7 Reorder the terms for easier multiplication: 0f = -6x2 + 6x + 7 Anything times zero is zero. 0f = -6x2 + 6x + 7 Reorder the terms: 0 = 7 + 6x + -6x2 Solving 0 = 7 + 6x + -6x2 Solving for variable 'x'. Combine like terms: 0 + -7 = -7 -7 + -6x + 6x2 = 7 + 6x + -6x2 + -7 + -6x + 6x2 Reorder the terms: -7 + -6x + 6x2 = 7 + -7 + 6x + -6x + -6x2 + 6x2 Combine like terms: 7 + -7 = 0 -7 + -6x + 6x2 = 0 + 6x + -6x + -6x2 + 6x2 -7 + -6x + 6x2 = 6x + -6x + -6x2 + 6x2 Combine like terms: 6x + -6x = 0 -7 + -6x + 6x2 = 0 + -6x2 + 6x2 -7 + -6x + 6x2 = -6x2 + 6x2 Combine like terms: -6x2 + 6x2 = 0 -7 + -6x + 6x2 = 0 Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -1.166666667 + -1x + x2 = 0 Move the constant term to the right: Add '1.166666667' to each side of the equation. -1.166666667 + -1x + 1.166666667 + x2 = 0 + 1.166666667 Reorder the terms: -1.166666667 + 1.166666667 + -1x + x2 = 0 + 1.166666667 Combine like terms: -1.166666667 + 1.166666667 = 0.000000000 0.000000000 + -1x + x2 = 0 + 1.166666667 -1x + x2 = 0 + 1.166666667 Combine like terms: 0 + 1.166666667 = 1.166666667 -1x + x2 = 1.166666667 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 = 1.166666667 + 0.25 Reorder the terms: 0.25 + -1x + x2 = 1.166666667 + 0.25 Combine like terms: 1.166666667 + 0.25 = 1.416666667 0.25 + -1x + x2 = 1.416666667 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = 1.416666667 Calculate the square root of the right side: 1.190238072 Break this problem into two subproblems by setting (x + -0.5) equal to 1.190238072 and -1.190238072.Subproblem 1
x + -0.5 = 1.190238072 Simplifying x + -0.5 = 1.190238072 Reorder the terms: -0.5 + x = 1.190238072 Solving -0.5 + x = 1.190238072 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 = 1.190238072 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 1.190238072 + 0.5 x = 1.190238072 + 0.5 Combine like terms: 1.190238072 + 0.5 = 1.690238072 x = 1.690238072 Simplifying x = 1.690238072Subproblem 2
x + -0.5 = -1.190238072 Simplifying x + -0.5 = -1.190238072 Reorder the terms: -0.5 + x = -1.190238072 Solving -0.5 + x = -1.190238072 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 = -1.190238072 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -1.190238072 + 0.5 x = -1.190238072 + 0.5 Combine like terms: -1.190238072 + 0.5 = -0.690238072 x = -0.690238072 Simplifying x = -0.690238072Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.690238072, -0.690238072}
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