[(7x+5)+4y][(7x+5)-4y]=

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Solution for [(7x+5)+4y][(7x+5)-4y]= equation: 


Simplifying
[(7x + 5) + 4y][(7x + 5) + -4y] = 0

Reorder the terms:
[(5 + 7x) + 4y][(7x + 5) + -4y] = 0

Remove parenthesis around (5 + 7x)
[5 + 7x + 4y][(7x + 5) + -4y] = 0

Reorder the terms:
[5 + 7x + 4y][(5 + 7x) + -4y] = 0

Remove parenthesis around (5 + 7x)
[5 + 7x + 4y][5 + 7x + -4y] = 0

Multiply [5 + 7x + 4y] * [5 + 7x + -4y]
[5[5 + 7x + -4y] + 7x * [5 + 7x + -4y] + 4y * [5 + 7x + -4y]] = 0
[[5 * 5 + 7x * 5 + -4y * 5] + 7x * [5 + 7x + -4y] + 4y * [5 + 7x + -4y]] = 0
[[25 + 35x + -20y] + 7x * [5 + 7x + -4y] + 4y * [5 + 7x + -4y]] = 0
[25 + 35x + -20y + [5 * 7x + 7x * 7x + -4y * 7x] + 4y * [5 + 7x + -4y]] = 0

Reorder the terms:
[25 + 35x + -20y + [35x + -28xy + 49x2] + 4y * [5 + 7x + -4y]] = 0
[25 + 35x + -20y + [35x + -28xy + 49x2] + 4y * [5 + 7x + -4y]] = 0
[25 + 35x + -20y + 35x + -28xy + 49x2 + [5 * 4y + 7x * 4y + -4y * 4y]] = 0

Reorder the terms:
[25 + 35x + -20y + 35x + -28xy + 49x2 + [28xy + 20y + -16y2]] = 0
[25 + 35x + -20y + 35x + -28xy + 49x2 + [28xy + 20y + -16y2]] = 0

Reorder the terms:
[25 + 35x + 35x + -28xy + 28xy + 49x2 + -20y + 20y + -16y2] = 0

Combine like terms: 35x + 35x = 70x
[25 + 70x + -28xy + 28xy + 49x2 + -20y + 20y + -16y2] = 0

Combine like terms: -28xy + 28xy = 0
[25 + 70x + 0 + 49x2 + -20y + 20y + -16y2] = 0
[25 + 70x + 49x2 + -20y + 20y + -16y2] = 0

Combine like terms: -20y + 20y = 0
[25 + 70x + 49x2 + 0 + -16y2] = 0
[25 + 70x + 49x2 + -16y2] = 0

Solving
25 + 70x + 49x2 + -16y2 = 0

Solving for variable 'x'.

The solution to this equation could not be determined.

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