a^2-21-35=0

Solution for a^2-21-35=0 equation:

Simplifying
a2 + -21 + -35 = 0

Reorder the terms:
-21 + -35 + a2 = 0

Combine like terms: -21 + -35 = -56
-56 + a2 = 0

Solving
-56 + a2 = 0

Solving for variable 'a'.

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

Add '56' to each side of the equation.
-56 + 56 + a2 = 0 + 56

Combine like terms: -56 + 56 = 0
0 + a2 = 0 + 56
a2 = 0 + 56

Combine like terms: 0 + 56 = 56
a2 = 56

Simplifying
a2 = 56

Take the square root of each side:
a = {-7.483314774, 7.483314774}