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Simplifying ax2 + -4x + 9 = 0 Reorder the terms: 9 + ax2 + -4x = 0 Solving 9 + ax2 + -4x = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + ax2 + -9 + -4x = 0 + -9 Reorder the terms: 9 + -9 + ax2 + -4x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + ax2 + -4x = 0 + -9 ax2 + -4x = 0 + -9 Combine like terms: 0 + -9 = -9 ax2 + -4x = -9 Add '4x' to each side of the equation. ax2 + -4x + 4x = -9 + 4x Combine like terms: -4x + 4x = 0 ax2 + 0 = -9 + 4x ax2 = -9 + 4x Divide each side by 'x2'. a = -9x-2 + 4x-1 Simplifying a = -9x-2 + 4x-1
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