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a
- 2, 1, 4
b
0 , 2, 4
c
0,1,4
d
- 2, 2, 4
answer is D.
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Detailed Solution
We have, x2−x−6=x2−x−6, if x≤−2 or x≥3−x2−x−6, if −23In this case, we have x2−x−6=x2−x−6 ∴ x2−x−6=x+2⇒ x2−x−6=x+2⇒ x2−2x−8=0⇒ (x−4)(x+2)=0.⇒ x=−2,4CASE II When −2