Question

20-5p^2q^2

Answer 1

factor out the 5 first from both the terms
what do u get ?

Answer 2

5(4-p^2q^2)

Answer 3

correct!

now 4 is the square of which number ?

Answer 4

20

Answer 5

4 is the square of 2!

\(\large 5 (2^2 - (pq)^2)\)
got this ?

Answer 6

u can now use
\(\large a^2-b^2= (a+b)(a-b)\)
here a = 2
b = pq

Answer 7

\(\large 5 (2+pq)(2-pq)\)