[a+(90-a)]*[a+(90-a)]=(90)*(90)

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Solution for [a+(90-a)]*[a+(90-a)]=(90)*(90) equation: 


Simplifying
[a + (90 + -1a)][a + (90 + -1a)] = (90)(90)

Remove parenthesis around (90 + -1a)
[a + 90 + -1a][a + (90 + -1a)] = (90)(90)

Reorder the terms:
[90 + a + -1a][a + (90 + -1a)] = (90)(90)

Combine like terms: a + -1a = 0
[90 + 0][a + (90 + -1a)] = (90)(90)
[90][a + (90 + -1a)] = (90)(90)

Remove parenthesis around (90 + -1a)
90[a + 90 + -1a] = (90)(90)

Reorder the terms:
90[90 + a + -1a] = (90)(90)

Combine like terms: a + -1a = 0
90[90 + 0] = (90)(90)
90[90] = (90)(90)

Multiply 90 * 90
8100 = (90)(90)

Multiply 90 * 90
8100 = 8100

Add '-8100' to each side of the equation.
8100 + -8100 = 8100 + -8100

Combine like terms: 8100 + -8100 = 0
0 = 8100 + -8100

Combine like terms: 8100 + -8100 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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