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√( 13 -a√10) = √8 + √5
take square both sides ,
13 -a√10 = 13 + 2√40
-a√10 = 2√40
-a√10 =4√10
a = -4 ( answer)
take square both sides ,
13 -a√10 = 13 + 2√40
-a√10 = 2√40
-a√10 =4√10
a = -4 ( answer)
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