Find a polynomial f (x) of degree 3 with real coefficients and the following zeros. -3, 1+2i
f(x) =
x
?

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.

i think the answer is c sorry if it's wrong

answer: you will have more water.