Question

Answer 1

`[9]`

Vì `(x^3 - 8x^2 + 15x)^2; (3x^2 - 10x + 3)^2 >=0 forall x in RR`

`-> {(x^3 - 8x^2 + 15x =0),(3x^2-10x+3=0):}`

`<=> {(x = 5), (x=0), (x = 3):}`

`=>` Tổng `= 5 + 0 + 3 = 8`.