What is the value of the expression when x=4 and y=-2?

x² + xy³

__

2

The expression is

x² + xy³ / 2

where x = 4 and y = - 2

putting the values of x and y in the expression we get,

4² + 4 (-2) ³ / 2 = 16 + 4 (-8) / 2

= 16 + (-32) / 2

= - 16/2

= - 8

the value of the expression is - 2