a=(2x+5y)*(2x+5y)

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Solution for a=(2x+5y)*(2x+5y) equation: 


Simplifying
a = (2x + 5y)(2x + 5y)

Multiply (2x + 5y) * (2x + 5y)
a = (2x * (2x + 5y) + 5y * (2x + 5y))
a = ((2x * 2x + 5y * 2x) + 5y * (2x + 5y))

Reorder the terms:
a = ((10xy + 4x2) + 5y * (2x + 5y))
a = ((10xy + 4x2) + 5y * (2x + 5y))
a = (10xy + 4x2 + (2x * 5y + 5y * 5y))
a = (10xy + 4x2 + (10xy + 25y2))

Reorder the terms:
a = (10xy + 10xy + 4x2 + 25y2)

Combine like terms: 10xy + 10xy = 20xy
a = (20xy + 4x2 + 25y2)

Solving
a = 20xy + 4x2 + 25y2

Solving for variable 'a'.

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

Simplifying
a = 20xy + 4x2 + 25y2

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