Question

.va rog muuult e urgent ​

Answer 1

2x -5 diferit de 0 => 2x diferit de 5
2x-5 | 2x-5
2x-5 | 3x+8
Acum amplificam
2x-5 | 6x-15
2x-5 | 6x+16
dar 2x-5 mai divide si diferenta lor
2x-5 | (6x+16)-(6x-15)
2x-5 | 6x+16 - 6x+15
2x-5 | 31
2x | 36
x | 18
x apartine D18
x € { -18,-9,-6,-3,-2,-1,1,2,3,6,9,18 }
Deci A = { -18,-9,-6,-3,-2,-1,1,2,3,6,9,18 }

x+2 diferit de 0 => x diferit de -2
x+2 | x+2
x+2 | 11
x | 9
x apartine D9
x € { -9,-3,-1,1,3,9 }
Deci B = { -9,-3,-1,1,3,9 }
A intersectat B = { -9,-3,-1,1,3,9 }
A reunit B = {-18,-9,-6,-3,-2,-1,1,2,3,6,9,18 }
A \ B = { -18,-6,-2,2,6,18 }
B \ A = { multimea vida }