Question

calcule 4xy-2x,sendo x=-3e y=7 resposta

Answer 1

4 . (-3) . 7 - 2 . (-3)
- 12 . 7 + 6
-84 + 6
-78

Answer 2

$4xy - 2x, \: sendo \: x = - 3 \: \: e \: \: y = 7 \\ 4 \times ( - 3) \times 7 - 2 \times ( - 3) = \\ - 12 \times 7 + 6 = \\ - 84 + 6 = \\ \boxed{ - 78}$