Find the value of $ ( p + 2q)^2 - (p -2q)^2$
Answer & explanation
Correct answer: option 2
We know that,
a2 - b2 = (a + b)(a - b).
(p + 2q)2 - (p - 2q)2
= (p + 2q)2 - (p - 2q)2
= p2 + 4q2 + 4pq - p2 - 4q2 + 4pq
= 8pq.
Find the value of $ ( p + 2q)^2 - (p -2q)^2$
Correct answer: option 2
We know that,
a2 - b2 = (a + b)(a - b).
(p + 2q)2 - (p - 2q)2
= (p + 2q)2 - (p - 2q)2
= p2 + 4q2 + 4pq - p2 - 4q2 + 4pq
= 8pq.