Question

Simplify: (ab-pq)^2 - (ab+pq)^2 WITH SOLUTION PLEASE..​

Answer 1

Answer:

∴

A(ΔPQR)

A(ΔABC)

=

PQ

2

AB

2

=

3

2

2

2

=

9

4

Answer 2

Answer:

$(ab - pq {)}^{2} - (ab + pq) {}^{2} \\ (ab {)}^{2} +( pq {)}^{2} - 2abpq - \: ((ab {)}^{2} + (pq {)}^{2} + 2abpq) \\ (ab {)}^{2} + (pq {)}^{2} - (ab {)}^{2} - (pq {)}^{2} - 2abpq - 2abpq (by \: opening \: bracket \: we \: change \: the \: sign)\\ = - 4abpq$

we use the formula (a+b)²= a²+b²+2ab

and (a-b)²= a²+b²-2ab