Simplify (2√15+√5)(√15+3√5)
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2 √15 * (√15 + 3√5 ) + √5 * (√15 + 3 √5 )
= 2 *15 + 2 * 3* √75 + √75 + 3 * 5
= 45 + 7 * √75
= 45 + 35 * √3
= 2 *15 + 2 * 3* √75 + √75 + 3 * 5
= 45 + 7 * √75
= 45 + 35 * √3
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