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Simplifying
2b2 + -40 = 0
Reorder the terms:
-40 + 2b2 = 0
Solving
-40 + 2b2 = 0
Solving for variable 'b'.
Move all terms containing b to the left, all other terms to the right.
Add '40' to each side of the equation.
-40 + 40 + 2b2 = 0 + 40
Combine like terms: -40 + 40 = 0
0 + 2b2 = 0 + 40
2b2 = 0 + 40
Combine like terms: 0 + 40 = 40
2b2 = 40
Divide each side by '2'.
b2 = 20
Simplifying
b2 = 20
Take the square root of each side:
b = {-4.472135955, 4.472135955}
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