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