Question

facrorise .
63a2-112b2 ​

Answer 1

it is the answer for this question

Answer 2

Answer: 7(3a + 4b) (3a-4b)

7×9=63

7×16=112

So we can write:

= 7(9a2-16b2)

3×3=9

4×4=16

= 7[(3a)2 - (4b)2]

= 7(3a - 4a)2

It is in the form:(a-b)2=(a-b) (a+b)

Here a=3a

b=4b

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