Factor.
49-4u?
what is the final answer?

(7 + 2√u)(7 - 2√u)

Step-by-step explanation:

There are two terms here, 49 and -4u.  These terms have nothing in common, so any factors will not be rational unless u is a positive perfect square.

However, we could rewrite 49 - 4u as 7^2 - [2√u]^2, which is the difference of two squares.  This latter result can be factored as

(7 + 2√u)(7 - 2√u)

if the pizza is divided equally into 2 equal halves then you would get

πr^2/2

where r is the radius of the pizza.

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