Question

(-2)la puterea a 2[1-2(x+5)]>= x , unde x e Z

Answer 1

(-2)²[1-2(x+5)]≥x
4(1-2x-10)≥x
4-8x-40≥x
-36≥x+8x
-36≥9x
9x≤-36
x≤-36:9
x≤-4
x∈{-∞,-4}