Verified Answer :

xSamx

You'll need to expand (x − 2)(x + 10) first,

(x − 2)(x + 10) = 13
\(x^2+8 x-20=13\)
\(x^2+8 x+16=49\)
\((x+4)^2=49\)
\(x+4= \pm 7\)
\(x=3 , x=-11\)

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