Why does The lesson compare a thesis to an umbrella?

a thesis is similar to an umbrella because an umbrella covers everything it protects, in the same way a thesis should cover the entirety of a text.

Explanation:

f(x) = -x³ + (3/2)x² + (11/3)x + 3.

Step-by-step explanation:

Given, real zeroes of f(x) are -2, 1/2, 3.

⇒ f(x)  = -(x+2)(x-1/2)(x-3). (- sign because given leading coefficient is negative)

⇒f(x) = -x³ + (3/2)x² + (11/3)x + 3.

as the real zeroes are fixed, only one such polynomial is possible.