help Write a polynomial function of minimum degree with real coefficients whose zeros include those listed. Write the polynomial in standard form.
2, -4, and 1 + 3i

f(x) = x4 - 2x2 + 36x - 80
f(x) = x4 - 3x3 + 6x2 - 18x + 80
f(x) = x4 - 9x2 + 36x - 80
f(x) = x4 - 3x3 - 6x2 + 18x - 80

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?