Multiplicando expresiones radicales (avanzado)

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Multiplicando radicales
Multiplica y simplifica:
1. $-3\sqrt {49} \times 2\sqrt {28}$
Expande y simplifica:
1. $2\sqrt 2 \;\left( {3\sqrt {50} -2\sqrt 8 + 5\sqrt {98} } \right)$

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