Question

p^2 - 4pq + 4q^2 -r^2
(FACTORISE THE FOLLOWING EXPPESSION)​

Answer 1

p²-4pq+4q²-r²

= {(p)² - 2×p×2q + (2q)²} - r² [p²-4pq+2q² is the expanded form of (p-2q)²

= (p-2q)² - r²

= (p-2q+r)(p-2q-r)

Using identity a²-b² = (a+b)(a-b)

Hope it helps....

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Answer 2

I have given your answer in that following image