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Simplifying 21x8 + -27x5 + 15x2 = 0 Reorder the terms: 15x2 + -27x5 + 21x8 = 0 Solving 15x2 + -27x5 + 21x8 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3x2'. 3x2(5 + -9x3 + 7x6) = 0 Ignore the factor 3.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 + -9x3 + 7x6)' equal to zero and attempt to solve: Simplifying 5 + -9x3 + 7x6 = 0 Solving 5 + -9x3 + 7x6 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 0.7142857143 + -1.285714286x3 + x6 = 0 Move the constant term to the right: Add '-0.7142857143' to each side of the equation. 0.7142857143 + -1.285714286x3 + -0.7142857143 + x6 = 0 + -0.7142857143 Reorder the terms: 0.7142857143 + -0.7142857143 + -1.285714286x3 + x6 = 0 + -0.7142857143 Combine like terms: 0.7142857143 + -0.7142857143 = 0.0000000000 0.0000000000 + -1.285714286x3 + x6 = 0 + -0.7142857143 -1.285714286x3 + x6 = 0 + -0.7142857143 Combine like terms: 0 + -0.7142857143 = -0.7142857143 -1.285714286x3 + x6 = -0.7142857143 The x term is -1.285714286x3. Take half its coefficient (-0.642857143). Square it (0.4132653063) and add it to both sides. Add '0.4132653063' to each side of the equation. -1.285714286x3 + 0.4132653063 + x6 = -0.7142857143 + 0.4132653063 Reorder the terms: 0.4132653063 + -1.285714286x3 + x6 = -0.7142857143 + 0.4132653063 Combine like terms: -0.7142857143 + 0.4132653063 = -0.301020408 0.4132653063 + -1.285714286x3 + x6 = -0.301020408 Factor a perfect square on the left side: (x3 + -0.642857143)(x3 + -0.642857143) = -0.301020408 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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