25x^2-y^2=(5x-y)(5x+y)

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Solution for 25x^2-y^2=(5x-y)(5x+y) equation:


Simplifying
25x2 + -1y2 = (5x + -1y)(5x + y)

Multiply (5x + -1y) * (5x + y)
25x2 + -1y2 = (5x * (5x + y) + -1y * (5x + y))
25x2 + -1y2 = ((5x * 5x + y * 5x) + -1y * (5x + y))

Reorder the terms:
25x2 + -1y2 = ((5xy + 25x2) + -1y * (5x + y))
25x2 + -1y2 = ((5xy + 25x2) + -1y * (5x + y))
25x2 + -1y2 = (5xy + 25x2 + (5x * -1y + y * -1y))
25x2 + -1y2 = (5xy + 25x2 + (-5xy + -1y2))

Reorder the terms:
25x2 + -1y2 = (5xy + -5xy + 25x2 + -1y2)

Combine like terms: 5xy + -5xy = 0
25x2 + -1y2 = (0 + 25x2 + -1y2)
25x2 + -1y2 = (25x2 + -1y2)

Add '-25x2' to each side of the equation.
25x2 + -25x2 + -1y2 = 25x2 + -25x2 + -1y2

Combine like terms: 25x2 + -25x2 = 0
0 + -1y2 = 25x2 + -25x2 + -1y2
-1y2 = 25x2 + -25x2 + -1y2

Combine like terms: 25x2 + -25x2 = 0
-1y2 = 0 + -1y2
-1y2 = -1y2

Add 'y2' to each side of the equation.
-1y2 + y2 = -1y2 + y2

Combine like terms: -1y2 + y2 = 0
0 = -1y2 + y2

Combine like terms: -1y2 + y2 = 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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