Question

Solve for x.

a. 20
b. 6
c. 2√5
d. 9

Answer 1

here we have to apply the first theorem of Euclide

Answer 2

so we have to solve this equation:
\[{x^2} = 4\left( {5 + 4} \right)\]
what is x?

Answer 3

6? @Michele_Laino