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