Question

(3p-4q)(3p-4q)
Solve with identities

my doubt is when we take b square should we take (+4) or(-4)

Answer 1

$(3p - 4q) {}^{2} \\ (3p) {}^{2} + (4q) {}^{2} - 2 \times3 p \times 4q \\ 9 {p}^{2} + 16 {q }^{2} - 24pq$

Answer 2

Step-by-step explanation:

identity is a2. - b2

a2 +b2 -2ab