Question

2x+3×y para:
×=-1 e y=2
×=3 e y=-1
x=-2 e y=0​

Answer 1

Resposta:

×=-1 e y=2

$2x + 3xy \\ 2 \times ( - 1) + 3 \times ( - 1) \times 2 \\ - 2 - 3 \times 2 \\ - 2 - 6 \\ - 8$

×=3 e y=-1

$2x + 3xy \\ 2 \times 3 + 3 \times 3 \times ( - 1) \\ 6 + 9 \times ( - 1) \\ 6 - 9 \\ - 3$

x=-2 e y=0

$2x + 3xy \\ 2 \times ( - 2) + 3 \times ( - 2) \times 0 \\ - 4 - 6 \\ - 10$