3x^5 - 5x^3 = 0 , tentukan nilai x
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x^3 (3x^2 - 5) = 0
pembuat nol :
x^3 = 0 ------> x = 0
dan
3x^2 - 5 = 0
3x^2 = 5
x^2 = 5/3
x = +- √(5/3) = +- 1/3 √15
solusi = {-1/3 √15, 0 , 1/3 √15}