Answer:
the 1st one i think cause its 500 all together
Xy= (10-3i)(3-10i)
=30-100<em>i- 9i+30i^2
=30^2-109i+30</em>

- Simplify ⇨ 1/x(x+a) + 1/x(x-a)


To add or subtract expressions, expand them to make their denominators the same. Least common multiple of
and
is
. Multiply
. Multiply
.

Because
and
have the same denominator, add them by adding their numerators.

Combine like terms in x-a+x+a.

Cancel out x in both the numerator and denominator.

Expand
.

Using the defects method, which relationship represents the Law of Cosines if the measure of the included angle between the sides a and b of ΔABC is less <span>than 90°?
</span><span>C) area of square c2 = area of square a2 + area of square b2 − area of defect1 − area of defect2
</span>
I'm really not familiar with this subject area but I have encountered this problem before and this answer was confirmed.