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(-2√3-8√5)×(4√3+3√5)= -24- 6√15 - 32√15- 120= -38√15 -144
(-12+√2)×(4-3√2) = -48 + 36√2 + 4√2 - 6 = 40√2 - 54
(-2√3-8√5)×(4√3+3√5) = -24 - 6√15 - 32√15 - 120 = - 38√15 - 144
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