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B
−1,−8
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C
−1,8
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D
1,−8
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Solution
The correct option is A1,−8 The given equation is x23+x13−2=0 Put x13=y, then equation reduces to y2+y−2=0 ⇒(y−1)(y+2)=0 ⇒y=1 or y=−2 ⇒x13=1 or x13=−2 ∴x=(1)3 or x=(−2)3=−8 Hence, the real roots of the given equations are 1,−8.