Write as a product: ax*2+ay*2–bx*2–by*2+b–a

Solution:

Given that,

We have to write the above expression as product

Which means, we have to write as product of factors

From given expression,

Thus the given expression is written as product

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.