Question

VAROG......AJUTOR ex.1 (b) ,2,4

Answer 1

ex1 b
=125x^3+150x^2y+60xy^2+8y^3
ex2
a=81*132y-81*176y+81*45y=81y(132-176-45)=81y*(-89)
b=(radical din3x+1)^2
c=3(x^2-2x+1)=3(x-1)^2
ex4
a=3x(x+2)/(x+2)=3x
b=2/(x-2)amplificam cu x+2
    1/x+2 amplificam cu x-2
   (2x+4-x+2)/(x-2)(x+2)=(x+6)/(x^2+4)