Question

please answer me fast it's of IcSe board . ​

Answer 1

Answer:

Hope this is OK for you completely

Answer 2

Answer:

x_y= -4/7-2/5 = -34/35

y-x = 2/5-(-4/7)

= 2/5+4/7

= 34/35

therefore , x-y is not equal to y-x

-(X+y) = 4/7-2/5

= 6/35

(-x) + (-y) = 34/35

therefore , -(X+y) is not equal to (-x)+(-y)