Question

30. 9a2 +6a +1-36b2​

Answer 1

Answer:

please refer to the above attachment

Answer 2

Answer:

Answer

Given : 9a

2

+6a+1−36b

2

We can further write its as

9a

2

+6a+1−36b

2

=(9a

2

+6a+1)−36b

2

So we get

9a

2

+6a+1−36b

2

=[(3a)

2

+2×3×1+1

2

]−(6b)

2

9a

2

+6a+1−36b

2

=(3a+1)

2

−(6b)

2

Based on the equation a

2

−b

2

=(a+b)(a−b)

We get,

9a

2

+6a+1−36b

2

=(3a+1+6b)(3a+1−6b)