Question

factorise...63a^2 - 112b^2..​

Answer 1

I don't understand the question

Answer 2

Answer:

The answer is 7(3a+4b)(3a-4b)

Step-by-step explanation:

63$a^{2}$-112$b^{2}$

=7(9$a^{2}$-16$b^{2}$)

=7[($3a)^{2}$-($4b)^{2}$]

=7(3a+4b)(3a-4b)