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Simplifying 7x4 + -5x2 + -16 = 0 Reorder the terms: -16 + -5x2 + 7x4 = 0 Solving -16 + -5x2 + 7x4 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. -2.285714286 + -0.7142857143x2 + x4 = 0 Move the constant term to the right: Add '2.285714286' to each side of the equation. -2.285714286 + -0.7142857143x2 + 2.285714286 + x4 = 0 + 2.285714286 Reorder the terms: -2.285714286 + 2.285714286 + -0.7142857143x2 + x4 = 0 + 2.285714286 Combine like terms: -2.285714286 + 2.285714286 = 0.000000000 0.000000000 + -0.7142857143x2 + x4 = 0 + 2.285714286 -0.7142857143x2 + x4 = 0 + 2.285714286 Combine like terms: 0 + 2.285714286 = 2.285714286 -0.7142857143x2 + x4 = 2.285714286 The x term is -0.7142857143x2. Take half its coefficient (-0.3571428572). Square it (0.1275510204) and add it to both sides. Add '0.1275510204' to each side of the equation. -0.7142857143x2 + 0.1275510204 + x4 = 2.285714286 + 0.1275510204 Reorder the terms: 0.1275510204 + -0.7142857143x2 + x4 = 2.285714286 + 0.1275510204 Combine like terms: 2.285714286 + 0.1275510204 = 2.4132653064 0.1275510204 + -0.7142857143x2 + x4 = 2.4132653064 Factor a perfect square on the left side: (x2 + -0.3571428572)(x2 + -0.3571428572) = 2.4132653064 Calculate the square root of the right side: 1.553468798 Break this problem into two subproblems by setting (x2 + -0.3571428572) equal to 1.553468798 and -1.553468798.Subproblem 1
x2 + -0.3571428572 = 1.553468798 Simplifying x2 + -0.3571428572 = 1.553468798 Reorder the terms: -0.3571428572 + x2 = 1.553468798 Solving -0.3571428572 + x2 = 1.553468798 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x2 = 1.553468798 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x2 = 1.553468798 + 0.3571428572 x2 = 1.553468798 + 0.3571428572 Combine like terms: 1.553468798 + 0.3571428572 = 1.9106116552 x2 = 1.9106116552 Simplifying x2 = 1.9106116552 Take the square root of each side: x = {-1.382248767, 1.382248767}Subproblem 2
x2 + -0.3571428572 = -1.553468798 Simplifying x2 + -0.3571428572 = -1.553468798 Reorder the terms: -0.3571428572 + x2 = -1.553468798 Solving -0.3571428572 + x2 = -1.553468798 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x2 = -1.553468798 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x2 = -1.553468798 + 0.3571428572 x2 = -1.553468798 + 0.3571428572 Combine like terms: -1.553468798 + 0.3571428572 = -1.1963259408 x2 = -1.1963259408 Simplifying x2 = -1.1963259408 Reorder the terms: 1.1963259408 + x2 = -1.1963259408 + 1.1963259408 Combine like terms: -1.1963259408 + 1.1963259408 = 0.0000000000 1.1963259408 + x2 = 0.0000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.
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