0=-b^2+25

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Solution for 0=-b^2+25 equation: 


Simplifying
0 = -1b2 + 25

Reorder the terms:
0 = 25 + -1b2

Solving
0 = 25 + -1b2

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add 'b2' to each side of the equation.
0 + b2 = 25 + -1b2 + b2
Remove the zero:
b2 = 25 + -1b2 + b2

Combine like terms: -1b2 + b2 = 0
b2 = 25 + 0
b2 = 25

Simplifying
b2 = 25

Take the square root of each side:
b = {-5, 5}

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