Đáp án:
Giải thích các bước giải: x= ± 1/2 hoặc x = 1/4
#andy
`c) (x-1/2)(x+1/2)(4x-1)``<=> (x+1/2) = 0` hoặc `(x-1/2)= 0` hoặc `(4x-1) = 0``<=> x= ± 1/2 hoặc x = 1/4`
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