$-15 x^3\sqrt 2$
Work Step by Step
We are given: $-3\sqrt 5x^3 . \sqrt 10x^3$ $=-3\sqrt 5x^3\times10x^3$ $=-3 \sqrt 50x^6$ $=-3.5.x^3.\sqrt 2$ $=-15 x^3\sqrt 2$
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