Question

Factorise:p⁴+q⁴+p²q²​

Answer 1

It is not an equation it is an expression

p4+q4+p²q²

= (p²)² +(q²)² +2p²q²-p²q²

=(p²+q²)² -p²q²

=(p²+q²)² - (pq)²

=(p²+q² +pq)(p²+q²-pq) {∵ a²-b² =(a+b)(a-b)}

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