Question

How do you evaluate the expression `2(x-y)` for `x=1` and `y=-2`?

Answer 1

Substitute the value of x and y in the given expression;

2`(x-y)`

given x =1 and y =-2

2 `( 1-(-2))`

2 `( 1 + 2)`

2.`( 3 )`

6