1-(0.2x-0.4y-0.5)-0.4yесли x=-4 y=-7.7

Question

1-(0.2x-0.4y-0.5)-0.4yесли x=-4 y=-7.7

Answer 1

2) 1-0.2x+0.4+0.5-0.4xy

если x=-4 , а y=-7.7, то 1+0.8+3.08-0.5-12.32=-7.94

Ответ : -7.94