simplify .. (3+√5) (2-3√5)
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(3+√5) (2-3√5)
= 3(2) +3(-3√5) + √5(2) - 2(√5)(√5)
= 6 - 9√5 + 2√5 - 2(5)
= 6 - 7√5 -10
= -7√5 - 4
= 3(2) +3(-3√5) + √5(2) - 2(√5)(√5)
= 6 - 9√5 + 2√5 - 2(5)
= 6 - 7√5 -10
= -7√5 - 4
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