Question

1) 5(х - у); 2) 3(x+y); 3) (5х - у); 4) (3x+y)
при х= 2,5, y= 4,5.

Answer 1

1) 5(x-y)=5(2,5-4,5)=5×(-2)=-10

2) 3(x+y)=3(2,5+4,5)=3×7=21

3) (5x-y)=5×2,5-4,5=12,5-4,5=8

4) (3x+y)=3×2,5+4,5=7,5+4,5=12