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5√3 - 4 √4.3 + √25.3 - √16.3
5√3 - 4 . 2 √3 + 5 √3 - 4 √3
5 √3 - 8√3 + 5√3 -4√3
= -2√3
2. (√3+√5 ) (√3+√5 )
= √3 x √3 + √3 x √5 + √5 x √3 + √5 x √5
= 3 + √15 + √15 + 5
= 8 + 2√15 ( A )