Simplify these square roots. Please help me!

Just three problems. Here is the questions: http://oi43.tinypic.com/9qgveq.jpg

sqrt(-3)*sqrt(-3)=-3 because sqrt(x)*sqrt(x)=x for any x.

You also can solve it this way

sqrt(-3)*sqrt(-3)=sqrt(3)i*sqrt(3)i

=sqrt(3)sqrt(3) i^2

=3*i^2=3*-1=-3





sqrt(-25)sqrt(-9)

=sqrt(25)i*sqrt(9)i

=5*3*i^2

=15*-1=-15


1/i=1/i * i/i

=i/i^2

=i/-1=-i

1. 3 i *- sqrt of 3
2. 15
3. -i

sqrt is the square root sign

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