Question

Someone pleaseeeeeeee helpppppp me pleaseee​

Answer 1

Explanation:

20: is a drawing with compasses and rular

18e³f+45e²f^4 ( take 9 as a common factor, e² and f)

9e²f(2e+5f^3)

x²-4x-12 ( factorize)

(x-6)(x+2)=0

either : x-6=0

then x=6

or x+2=0

then x=2