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Simplifying factorx2 + 2x + 21 = 0 Reorder the terms: 21 + acfortx2 + 2x = 0 Solving 21 + acfortx2 + 2x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + acfortx2 + -21 + 2x = 0 + -21 Reorder the terms: 21 + -21 + acfortx2 + 2x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + acfortx2 + 2x = 0 + -21 acfortx2 + 2x = 0 + -21 Combine like terms: 0 + -21 = -21 acfortx2 + 2x = -21 Add '-2x' to each side of the equation. acfortx2 + 2x + -2x = -21 + -2x Combine like terms: 2x + -2x = 0 acfortx2 + 0 = -21 + -2x acfortx2 = -21 + -2x Divide each side by 'cfortx2'. a = -21c-1f-1o-1r-1t-1x-2 + -2c-1f-1o-1r-1t-1x-1 Simplifying a = -21c-1f-1o-1r-1t-1x-2 + -2c-1f-1o-1r-1t-1x-1
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