1.

Multiply (3sqrt(-7)-5sqrt(-2))(3sqrt(-2)+5sqrt(-2)

Answer»

SOLUTION : `(3sqrt(-7)-5sqrt(-2))(3sqrt(-2)+5sqrt(-2)`
`=3sqrt(7I)-5sqrt(-2i)(3sqrt(2i)+5sqrt(2i)`
`=i^2(3sqrt7-5sqrt2)(3sqrt2+5sqrt2)`
`=(-1)8sqrt2(3sqrt7-5sqrt2)=-24sqrt(14)+80`


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