Question

$3 {x}^{2} + x {y}^{3} =$

Answer 1

3.(-3)² + (-3).2³ 

3.9 + (-3).8
27-24= 3  

Answer 2

x=-3 É y=2
$3 {x}^{2} + x {y}^{3} =$
$3 ( { - 3}^{2} ) + ( - 3)( {2}^{3} ) =$
$3(9) + ( - 3)(8) =$
$27 - 24 = 3$