القيمة

 4*5=20

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X must be an extreemly small value.

This is twitter math, where everything is an integer.

Hmm, cant be zero

Hmm, 2 doesnt work.

Hmm, its 1, should have tried that first.

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(11⁴ - 9⁴)/(11² + 9²)

= (11² - 9²)(11² + 9²)/(11² + 9²)

= 11² - 9²

= (11 - 9)(11 + 9)

= (2)(20)

= 40

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