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Simplifying rX3 + -2x2 + 2x + -1 = 0 Reorder the terms: -1 + rX3 + 2x + -2x2 = 0 Solving -1 + rX3 + 2x + -2x2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '1' to each side of the equation. -1 + rX3 + 2x + 1 + -2x2 = 0 + 1 Reorder the terms: -1 + 1 + rX3 + 2x + -2x2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + rX3 + 2x + -2x2 = 0 + 1 rX3 + 2x + -2x2 = 0 + 1 Combine like terms: 0 + 1 = 1 rX3 + 2x + -2x2 = 1 Add '-2x' to each side of the equation. rX3 + 2x + -2x + -2x2 = 1 + -2x Combine like terms: 2x + -2x = 0 rX3 + 0 + -2x2 = 1 + -2x rX3 + -2x2 = 1 + -2x Add '2x2' to each side of the equation. rX3 + -2x2 + 2x2 = 1 + -2x + 2x2 Combine like terms: -2x2 + 2x2 = 0 rX3 + 0 = 1 + -2x + 2x2 rX3 = 1 + -2x + 2x2 Divide each side by 'X3'. r = X-3 + -2xX-3 + 2x2X-3 Simplifying r = X-3 + -2xX-3 + 2x2X-3
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