2(b^2-5)=18

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Solution for 2(b^2-5)=18 equation:


Simplifying
2(b2 + -5) = 18

Reorder the terms:
2(-5 + b2) = 18
(-5 * 2 + b2 * 2) = 18
(-10 + 2b2) = 18

Solving
-10 + 2b2 = 18

Solving for variable 'b'.

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

Add '10' to each side of the equation.
-10 + 10 + 2b2 = 18 + 10

Combine like terms: -10 + 10 = 0
0 + 2b2 = 18 + 10
2b2 = 18 + 10

Combine like terms: 18 + 10 = 28
2b2 = 28

Divide each side by '2'.
b2 = 14

Simplifying
b2 = 14

Take the square root of each side:
b = {-3.741657387, 3.741657387}

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