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Simplifying
4b2 + 5 = 77
Reorder the terms:
5 + 4b2 = 77
Solving
5 + 4b2 = 77
Solving for variable 'b'.
Move all terms containing b to the left, all other terms to the right.
Add '-5' to each side of the equation.
5 + -5 + 4b2 = 77 + -5
Combine like terms: 5 + -5 = 0
0 + 4b2 = 77 + -5
4b2 = 77 + -5
Combine like terms: 77 + -5 = 72
4b2 = 72
Divide each side by '4'.
b2 = 18
Simplifying
b2 = 18
Take the square root of each side:
b = {-4.242640687, 4.242640687}
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