Question

Rezolvati in R urmatoarele ecuaţii :
1) 3(x-1)+4(x-2)=5
2) 2x+1)²-(2x-1)²=x-5

Answer 1

Răspuns:

a) 3(x-1)+4(x-2)=3

3x-3+4x-8=3

3x+4x=3+8+3

7x=14

x=2

b) (2x+1)^2-(2x-1)^2=x-5

4x+1-4x+1=x-5

4x-4x-x=-5-1-1

-x=-7

x=7