Question

The question it's in the picture

Answer 1

Answer:

p^2-q^2

Step-by-step explanation:

(p-q)(p+q)

=p^2+pq-pq-q^2

=p^2-q^2

HOPE THIS BRING A SMILE IN YOUR FACE

Answer 2

Answer:

$p^2+q^2$

Step-by-step explanation:

$=(p+iq)(p-iq)$

$=p(p-iq)+iq(p-iq)\\=p^2-ipq+ipq+q^2\\=p^2+q^2$

Alternatively,

the two numbers are complex conjugates of each other. So you can use the formula:

$z\overline{z}=|z|^2$

$(p+iq)(p-iq)=p^2+q^2$

If this answer helped, please consider marking it as brainliest.