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Verified answer
Kelas 9 MatematikaBab Eksponensial
^ = pangkat
(1/5)^(x² - 2x - 3) < (1/5)^(-2x - 1)
x² - 2x - 3 > -2x - 1
x² - 2x + 2x - 3 + 1 > 0
x² - 2 > 0
(x + √2) (x - √2) > 0
x + √2 < 0
x < -√2
x - √2 > 0
x > √2
HP = { x | x < -√2 atau x > √2, x € bilangan real }