Question

E URGENT DAU COROANA
SUBIECTUL 2 EXERCITIUL 2

75f8073456539d91a1c0be8a78859819.pdf

Answer 1

Răspuns:

Explicație pas cu pas:

A) 90*1=90+1-90=91-90=1

B) (x*y)*z= (x+y-90)*z=(x+y-90)+z-90=x+(y+z-90)-90=x*(y+z-90)=x*(y*z)

C) (x^2)*(2x+1)=-74

x^2 + (2x+1)-90=-74

x^2 +2x +1 -90 + 74=0

X^2 +2x -15=0

(x-3)(x+5)=0

x=3

X=-5