F(x) = y = 30
x = a
Jadi :
a² + 5 = 30
a² = 25
a = √25
a = -5 atau 5
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F(x) = y = 30
x = a
Jadi :
a² + 5 = 30
a² = 25
a = √25
a = -5 atau 5
30 = a³ + 5
a³ = 30 - 5
a³ = 25
a = ³√25