Question

, 100 БАЛОВ по алгебре

Answer 1

1. x=y+2

{

2(y+2)-3y=6

2y+4-3y=6

y= -2

x= -2+2=0

2. x²-y²= 13

{

x-y=1

x=y+1

{

(y+1)²-y²=13

y²+2y+1-y²=13

2y=12

y=6

x=7

3. 2x+3y≤2

3y≤ 2-2x

x 0 1 2

y 2 0 -2

4. A и B

5. не знаю (