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Simplifying 7x4 + 21x3 + 35x2 = 0 Reorder the terms: 35x2 + 21x3 + 7x4 = 0 Solving 35x2 + 21x3 + 7x4 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '7x2'. 7x2(5 + 3x + x2) = 0 Ignore the factor 7.Subproblem 1
Set the factor 'x2' equal to zero and attempt to solve: Simplifying x2 = 0 Solving x2 = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x2 = 0 Take the square root of each side: x = {0}Subproblem 2
Set the factor '(5 + 3x + x2)' equal to zero and attempt to solve: Simplifying 5 + 3x + x2 = 0 Solving 5 + 3x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-5' to each side of the equation. 5 + 3x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + 3x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 3x + x2 = 0 + -5 3x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 3x + x2 = -5 The x term is 3x. Take half its coefficient (1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. 3x + 2.25 + x2 = -5 + 2.25 Reorder the terms: 2.25 + 3x + x2 = -5 + 2.25 Combine like terms: -5 + 2.25 = -2.75 2.25 + 3x + x2 = -2.75 Factor a perfect square on the left side: (x + 1.5)(x + 1.5) = -2.75 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.Solution
x = {0}
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