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fozzzy
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Plugin in value of x
Let x=2
representing x bar with=Ẍ =x+1
\((Ẍ)^2\)-{\((x)^2\)}- this part the one in the curly bracket the value of x has to be first squared and then represented in Ẍ form(\((2)^2\)+1)
\((2+1)^2\)-(4+1)
\((3)^2\)-(5)=4
9-5=4
now put x=2 in the given answer choices only 2x=4 answer D.
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Hello from the GMAT Club BumpBot!

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