(4x+5y+4)(4x+5y-4)=0

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Solution for (4x+5y+4)(4x+5y-4)=0 equation: 


Simplifying
(4x + 5y + 4)(4x + 5y + -4) = 0

Reorder the terms:
(4 + 4x + 5y)(4x + 5y + -4) = 0

Reorder the terms:
(4 + 4x + 5y)(-4 + 4x + 5y) = 0

Multiply (4 + 4x + 5y) * (-4 + 4x + 5y)
(4(-4 + 4x + 5y) + 4x * (-4 + 4x + 5y) + 5y * (-4 + 4x + 5y)) = 0
((-4 * 4 + 4x * 4 + 5y * 4) + 4x * (-4 + 4x + 5y) + 5y * (-4 + 4x + 5y)) = 0
((-16 + 16x + 20y) + 4x * (-4 + 4x + 5y) + 5y * (-4 + 4x + 5y)) = 0
(-16 + 16x + 20y + (-4 * 4x + 4x * 4x + 5y * 4x) + 5y * (-4 + 4x + 5y)) = 0

Reorder the terms:
(-16 + 16x + 20y + (-16x + 20xy + 16x2) + 5y * (-4 + 4x + 5y)) = 0
(-16 + 16x + 20y + (-16x + 20xy + 16x2) + 5y * (-4 + 4x + 5y)) = 0
(-16 + 16x + 20y + -16x + 20xy + 16x2 + (-4 * 5y + 4x * 5y + 5y * 5y)) = 0

Reorder the terms:
(-16 + 16x + 20y + -16x + 20xy + 16x2 + (20xy + -20y + 25y2)) = 0
(-16 + 16x + 20y + -16x + 20xy + 16x2 + (20xy + -20y + 25y2)) = 0

Reorder the terms:
(-16 + 16x + -16x + 20xy + 20xy + 16x2 + 20y + -20y + 25y2) = 0

Combine like terms: 16x + -16x = 0
(-16 + 0 + 20xy + 20xy + 16x2 + 20y + -20y + 25y2) = 0
(-16 + 20xy + 20xy + 16x2 + 20y + -20y + 25y2) = 0

Combine like terms: 20xy + 20xy = 40xy
(-16 + 40xy + 16x2 + 20y + -20y + 25y2) = 0

Combine like terms: 20y + -20y = 0
(-16 + 40xy + 16x2 + 0 + 25y2) = 0
(-16 + 40xy + 16x2 + 25y2) = 0

Solving
-16 + 40xy + 16x2 + 25y2 = 0

Solving for variable 'x'.

The solution to this equation could not be determined.

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