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Verified answer
Bab EksponensialMatematika SMP Kelas IX
2ˣ + 2ˣ⁺³ = 72
2ˣ + 2ˣ . 2³ = 72
2ˣ + 2ˣ . 8 = 72
2ˣ + 8 . 2ˣ = 72
9 . 2ˣ = 72
2ˣ = 72 : 9
2ˣ = 8
2ˣ = 2³
x = 3
HP = { 3 }