Question

Expand (4p-5q)squre by using (a-b) square
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Answer 1

Answer:

(4p-5q)^2

=(4p)^2-2×4p×5q+(5q)^2

=16p^2-40pq+25q^2

Answer 2

Answer:

16p^2-40pq+25q^2

^ sign is used for raised to 2

(a-b)^2= a^2-2ab+b^2