Question

Find the product mentally.

Answer 1

The answer should be z2-144

Answer 2

Answer:

$z^2-144$

Step-by-step explanation:

Here the given expression,

$(z-12)(z+12)$

∵ By using the algebraic property,

$(a+b)(a-b)=a^2-b^2$

We get,

$(z-12)(z+12)=(z)^2 - (12)^2$

$\implies (z-12)(z+12)=z^2-144$

Which is the required product.

Therefore, FIRST option is correct.