Question

Multiply the pair conjugates using Product of Conjugates Pattern ( simplify) (ab - 7)( ab + 7)

Answer 1

Remember that

The product of conjugates is always of the form

a^2-b^2

This is called a difference of squares

In this problem we have

$\mleft(ab-7\mright)\mleft(ab+7\mright)$

so

$(ab)^2-7^2$$a^2b^2-49$