81+b(b)=225

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Solution for 81+b(b)=225 equation: 


Simplifying
81 + b(b) = 225

Multiply b * b
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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