It's a question from real and complex numbers which I can't solve. so someone PLZ HeLp

Step-by-step explanation:

Using the rules of exponents

× = , = , =

Simplifying the product of the first 2 terms

×

= ×

=

Simplifying the third term

5(

= 5 = 5

Performing the division, that is

← cancel on numerator/ denominator leaves

=

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.