Question

Simplify (5p+6q)²-(5q+6p)² for class 8

Answer 1

by identity -- (a²-b²) =a-b×a+b

(5p-6q)²-(5p+6q)²

5p(5p+6q)-6q(5p+6q)

25p²+30pq-30pq-36q²

25p²-36q²

Answer 2

by using identity

$(x + y)^{2} = x^{2} + y^{2} + 2xy$

(5p)^2 + (6q)^2 + 2*5p*6q

=25p^2 + 36q^2 + 60pq. (1)

by using identity

$(x - y)^{2} = x^{2} + y ^{2} - 2xy$

(5p)^2 + (6q)^2 - 2*5p*6q

=25p^2 + 36q^2 - 60pq. (2)

(1)-(2)

25p^2 + 36q^2 + 60pq - 25p^2 + 36q^2 - 60pq

[(36q)^2]^2

*= 36^4*

this is the answer.

hope this helps. mark as branliest plz