Question

EVALUACION DE EXPRESIONES ALGEBRAICAS SI X= 3, Y= -2, Z=-1

1- 2x²Y²+5YZ

2- 4X³+2 Y Z²​

Answer 1

$1)2 {x}^{2} {y}^{2} + 5yz = \\ 2 \times {3}^{2} \times {( - 2)}^{2} + 5 \times ( - 2) \times ( - 1) \\ 2 \times 9 \times 4 + 5 \times ( - 2) \times ( - 1) \\ 18 \times 4 + ( - 10) \times ( - 1 ) = \\ 72 + 1 0= \\ 82$

$2)4 {x}^{3} + 2y {z}^{2} = \\ 4 \times {3}^{3} + 2 \times ( - 2) \times {( - 1)}^{2} = \\ 4 \times 27 + 2 \times ( - 2) \times 1 = \\ 108 + ( - 4) \times 1 = \\ 108 + ( - 4) = \\ 108 - 4 = \\ 104$