(x-y)(x+y) (x^2+y^2) (x^4+y^4)

1 Answer

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rcmath | High School Teacher | (Level 1) Associate Educator

Posted on

The trick to this problem is to know what to multiply first. 
Difference if square rule states: `(x-y)(x+y)=(x^2-y^2)`

Keeping that in mind, we will work from left to right in order to apply this rule few times without having to do a lot of work.