A^2-21=4a

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Solution for A^2-21=4a equation:


Simplifying
A2 + -21 = 4a

Reorder the terms:
-21 + A2 = 4a

Solving
-21 + A2 = 4a

Solving for variable 'A'.

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

Add '21' to each side of the equation.
-21 + 21 + A2 = 21 + 4a

Combine like terms: -21 + 21 = 0
0 + A2 = 21 + 4a
A2 = 21 + 4a

Simplifying
A2 = 21 + 4a

Reorder the terms:
-21 + A2 + -4a = 21 + 4a + -21 + -4a

Reorder the terms:
-21 + A2 + -4a = 21 + -21 + 4a + -4a

Combine like terms: 21 + -21 = 0
-21 + A2 + -4a = 0 + 4a + -4a
-21 + A2 + -4a = 4a + -4a

Combine like terms: 4a + -4a = 0
-21 + A2 + -4a = 0

The solution to this equation could not be determined.

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