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Simplifying X4 + -5X2 = -1 Reorder the terms: -5X2 + X4 = -1 Solving -5X2 + X4 = -1 Solving for variable 'X'. Reorder the terms: 1 + -5X2 + X4 = -1 + 1 Combine like terms: -1 + 1 = 0 1 + -5X2 + X4 = 0 Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + -5X2 + -1 + X4 = 0 + -1 Reorder the terms: 1 + -1 + -5X2 + X4 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -5X2 + X4 = 0 + -1 -5X2 + X4 = 0 + -1 Combine like terms: 0 + -1 = -1 -5X2 + X4 = -1 The X term is -5X2. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5X2 + 6.25 + X4 = -1 + 6.25 Reorder the terms: 6.25 + -5X2 + X4 = -1 + 6.25 Combine like terms: -1 + 6.25 = 5.25 6.25 + -5X2 + X4 = 5.25 Factor a perfect square on the left side: (X2 + -2.5)(X2 + -2.5) = 5.25 Calculate the square root of the right side: 2.291287847 Break this problem into two subproblems by setting (X2 + -2.5) equal to 2.291287847 and -2.291287847.Subproblem 1
X2 + -2.5 = 2.291287847 Simplifying X2 + -2.5 = 2.291287847 Reorder the terms: -2.5 + X2 = 2.291287847 Solving -2.5 + X2 = 2.291287847 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + X2 = 2.291287847 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + X2 = 2.291287847 + 2.5 X2 = 2.291287847 + 2.5 Combine like terms: 2.291287847 + 2.5 = 4.791287847 X2 = 4.791287847 Simplifying X2 = 4.791287847 Take the square root of each side: X = {-2.188901059, 2.188901059}Subproblem 2
X2 + -2.5 = -2.291287847 Simplifying X2 + -2.5 = -2.291287847 Reorder the terms: -2.5 + X2 = -2.291287847 Solving -2.5 + X2 = -2.291287847 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + X2 = -2.291287847 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + X2 = -2.291287847 + 2.5 X2 = -2.291287847 + 2.5 Combine like terms: -2.291287847 + 2.5 = 0.208712153 X2 = 0.208712153 Simplifying X2 = 0.208712153 Take the square root of each side: X = {-0.456850252, 0.456850252}Solution
The solution to the problem is based on the solutions from the subproblems. X = {-2.188901059, 2.188901059, -0.456850252, 0.456850252}
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