Question

2. Expand (4a - 7b)²​

Answer 1

Answer:

4a-7b×4a-7b

is correct answer of this question

Answer 2

Answer:

We use (a-b)^2 identity

Which is a^2 + b^2 - 2ab

In this case take

a = 4a

b = 7b

Now, using the identity we get,

16a^2 + 49b^2 - 28ab