Q8 of 137 Page 100

Factories:

63a2 – 112b2

We have,


63a2 – 112b2


= 7(9a2 – 16b2)


By using the formula a2 – b2 = (a + b)(a – b)


We get,


63a2 – 112b2 = 7(9a2 – 16b2)


= 7{(3a)2 – (4b)2}


= 7(3a + 4b)(3a – 4b)


More from this chapter

All 137 →
6

Factories:

9a2b2 – 25

 7

Factories:

16a2 – 144

 9

Factories:

20a2 – 45b2

 10

Factories:

12x2 – 27