5-a^2=21

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Solution for 5-a^2=21 equation:


Simplifying
5 + -1a2 = 21

Solving
5 + -1a2 = 21

Solving for variable 'a'.

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

Add '-5' to each side of the equation.
5 + -5 + -1a2 = 21 + -5

Combine like terms: 5 + -5 = 0
0 + -1a2 = 21 + -5
-1a2 = 21 + -5

Combine like terms: 21 + -5 = 16
-1a2 = 16

Divide each side by '-1'.
a2 = -16

Simplifying
a2 = -16

Reorder the terms:
16 + a2 = -16 + 16

Combine like terms: -16 + 16 = 0
16 + a2 = 0

The solution to this equation could not be determined.

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