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Simplifying 81 + b2 = 225 Solving 81 + b2 = 225 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-81' to each side of the equation. 81 + -81 + b2 = 225 + -81 Combine like terms: 81 + -81 = 0 0 + b2 = 225 + -81 b2 = 225 + -81 Combine like terms: 225 + -81 = 144 b2 = 144 Simplifying b2 = 144 Take the square root of each side: b = {-12, 12}
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