Question

(x+y)-( x-y) при x 0.5 при y - 0.5

Answer 1

x = 0.5  y = - 0.5

(x+y)-( x-y) = х + у - х + у = 2у = 2*(-0,5) = -1

Answer 2

(x + y) – (x – y) = x + y – x + y = y + y = 2y
x = 0,5 ; y = – 0,5
2*(–0,5) = – 1
Ответ: – 1