Question: 69. ( sqrt{-9} cdot sqrt{-4} ) 70. ( sqrt{-36} cdot sqrt{-4} ) 71. ( sqrt{-8} cdot sqrt{-10} ) 72. ( sqrt{-12} cdot sqrt{-15} ) 73.

69. \$ \\sqrt{-9} \\cdot \\sqrt{-4} \$ 70. \$ \\sqrt{-36} \\cdot \\sqrt{-4} \$ 71. \$ \\sqrt{-8} \\cdot \\sqrt{-10} \$ 72. \$ \\sqrt{-12} \\cdot \\sqrt{-15} \$ 73. \$ (2+\\sqrt{-81})(-3-\\sqrt{-100}) \$ 74. \$ (1-\\sqrt{-64})(-2+\\sqrt{-49}) \$

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