(X+y)(x-y)=7

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Solution for (X+y)(x-y)=7 equation:


Simplifying
(X + y)(x + -1y) = 7

Multiply (X + y) * (x + -1y)
(X(x + -1y) + y(x + -1y)) = 7
((x * X + -1y * X) + y(x + -1y)) = 7
((xX + -1yX) + y(x + -1y)) = 7
(xX + -1yX + (x * y + -1y * y)) = 7
(xX + -1yX + (xy + -1y2)) = 7

Reorder the terms:
(xX + xy + -1yX + -1y2) = 7
(xX + xy + -1yX + -1y2) = 7

Solving
xX + xy + -1yX + -1y2 = 7

Solving for variable 'x'.

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

Add 'yX' to each side of the equation.
xX + xy + -1yX + yX + -1y2 = 7 + yX

Combine like terms: -1yX + yX = 0
xX + xy + 0 + -1y2 = 7 + yX
xX + xy + -1y2 = 7 + yX

Add 'y2' to each side of the equation.
xX + xy + -1y2 + y2 = 7 + yX + y2

Combine like terms: -1y2 + y2 = 0
xX + xy + 0 = 7 + yX + y2
xX + xy = 7 + yX + y2

Reorder the terms:
-7 + xX + xy + -1yX + -1y2 = 7 + yX + y2 + -7 + -1yX + -1y2

Reorder the terms:
-7 + xX + xy + -1yX + -1y2 = 7 + -7 + yX + -1yX + y2 + -1y2

Combine like terms: 7 + -7 = 0
-7 + xX + xy + -1yX + -1y2 = 0 + yX + -1yX + y2 + -1y2
-7 + xX + xy + -1yX + -1y2 = yX + -1yX + y2 + -1y2

Combine like terms: yX + -1yX = 0
-7 + xX + xy + -1yX + -1y2 = 0 + y2 + -1y2
-7 + xX + xy + -1yX + -1y2 = y2 + -1y2

Combine like terms: y2 + -1y2 = 0
-7 + xX + xy + -1yX + -1y2 = 0

The solution to this equation could not be determined.

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