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Simplifying X3 + -9x2 + 11x + 21 = 0 Reorder the terms: 21 + X3 + 11x + -9x2 = 0 Solving 21 + X3 + 11x + -9x2 = 0 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + X3 + 11x + -21 + -9x2 = 0 + -21 Reorder the terms: 21 + -21 + X3 + 11x + -9x2 = 0 + -21 Combine like terms: 21 + -21 = 0 0 + X3 + 11x + -9x2 = 0 + -21 X3 + 11x + -9x2 = 0 + -21 Combine like terms: 0 + -21 = -21 X3 + 11x + -9x2 = -21 Add '-11x' to each side of the equation. X3 + 11x + -11x + -9x2 = -21 + -11x Combine like terms: 11x + -11x = 0 X3 + 0 + -9x2 = -21 + -11x X3 + -9x2 = -21 + -11x Add '9x2' to each side of the equation. X3 + -9x2 + 9x2 = -21 + -11x + 9x2 Combine like terms: -9x2 + 9x2 = 0 X3 + 0 = -21 + -11x + 9x2 X3 = -21 + -11x + 9x2 Simplifying X3 = -21 + -11x + 9x2 Reorder the terms: 21 + X3 + 11x + -9x2 = -21 + -11x + 9x2 + 21 + 11x + -9x2 Reorder the terms: 21 + X3 + 11x + -9x2 = -21 + 21 + -11x + 11x + 9x2 + -9x2 Combine like terms: -21 + 21 = 0 21 + X3 + 11x + -9x2 = 0 + -11x + 11x + 9x2 + -9x2 21 + X3 + 11x + -9x2 = -11x + 11x + 9x2 + -9x2 Combine like terms: -11x + 11x = 0 21 + X3 + 11x + -9x2 = 0 + 9x2 + -9x2 21 + X3 + 11x + -9x2 = 9x2 + -9x2 Combine like terms: 9x2 + -9x2 = 0 21 + X3 + 11x + -9x2 = 0 The solution to this equation could not be determined.
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