a^2-1-72=0

Solution for a^2-1-72=0 equation:

Simplifying
a2 + -1 + -72 = 0

Reorder the terms:
-1 + -72 + a2 = 0

Combine like terms: -1 + -72 = -73
-73 + a2 = 0

Solving
-73 + a2 = 0

Solving for variable 'a'.

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

Add '73' to each side of the equation.
-73 + 73 + a2 = 0 + 73

Combine like terms: -73 + 73 = 0
0 + a2 = 0 + 73
a2 = 0 + 73

Combine like terms: 0 + 73 = 73
a2 = 73

Simplifying
a2 = 73

Take the square root of each side:
a = {-8.544003745, 8.544003745}