(X-4)(x+4)=9

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Solution for (X-4)(x+4)=9 equation:


Simplifying
(X + -4)(x + 4) = 9

Reorder the terms:
(-4 + X)(x + 4) = 9

Reorder the terms:
(-4 + X)(4 + x) = 9

Multiply (-4 + X) * (4 + x)
(-4(4 + x) + X(4 + x)) = 9
((4 * -4 + x * -4) + X(4 + x)) = 9
((-16 + -4x) + X(4 + x)) = 9
(-16 + -4x + (4 * X + x * X)) = 9
(-16 + -4x + (4X + xX)) = 9

Reorder the terms:
(-16 + 4X + -4x + xX) = 9
(-16 + 4X + -4x + xX) = 9

Solving
-16 + 4X + -4x + xX = 9

Solving for variable 'X'.

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

Add '16' to each side of the equation.
-16 + 4X + -4x + 16 + xX = 9 + 16

Reorder the terms:
-16 + 16 + 4X + -4x + xX = 9 + 16

Combine like terms: -16 + 16 = 0
0 + 4X + -4x + xX = 9 + 16
4X + -4x + xX = 9 + 16

Combine like terms: 9 + 16 = 25
4X + -4x + xX = 25

Add '4x' to each side of the equation.
4X + -4x + 4x + xX = 25 + 4x

Combine like terms: -4x + 4x = 0
4X + 0 + xX = 25 + 4x
4X + xX = 25 + 4x

Reorder the terms:
-25 + 4X + -4x + xX = 25 + 4x + -25 + -4x

Reorder the terms:
-25 + 4X + -4x + xX = 25 + -25 + 4x + -4x

Combine like terms: 25 + -25 = 0
-25 + 4X + -4x + xX = 0 + 4x + -4x
-25 + 4X + -4x + xX = 4x + -4x

Combine like terms: 4x + -4x = 0
-25 + 4X + -4x + xX = 0

The solution to this equation could not be determined.

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