2^(x+3) – 3*2^(x+1) +2× < 12
2×*2³ - 3* 2×*2 +2× < 12
2× (2^3-3*2 +1) < 12
2× (8-6+1) <12
2× *3 < 12 // : 3
2× < 4
2× < 2²
X< 2
x ∈ (- ∞; 2)
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Answers & Comments
2^(x+3) – 3*2^(x+1) +2× < 12
2×*2³ - 3* 2×*2 +2× < 12
2× (2^3-3*2 +1) < 12
2× (8-6+1) <12
2× *3 < 12 // : 3
2× < 4
2× < 2²
X< 2
x ∈ (- ∞; 2)