Asked by Robert
Exrpess each number in terms of i
a. root-21
b. -root-59
c. -root-9
d. root-28
a. root-21
b. -root-59
c. -root-9
d. root-28
Answers
Answered by
Quidditch
For a:
root(-21) = root( (21)*(-1) )
= root(21) * root(-1)
= root(21) * i
That should get you started
root(-21) = root( (21)*(-1) )
= root(21) * root(-1)
= root(21) * i
That should get you started
Answered by
MathMate
a.
sqrt(-21)
=sqrt(21*(-1))
=sqrt(21)*sqrt(-1)
=±sqrt(21) i
c.
-sqrt(-9)
=-sqrt(9*(-1))
=∓sqrt(9)*sqrt(-1)
=∓3i
Try problems a and d along the same lines. Post your results if you need confirmation.
sqrt(-21)
=sqrt(21*(-1))
=sqrt(21)*sqrt(-1)
=±sqrt(21) i
c.
-sqrt(-9)
=-sqrt(9*(-1))
=∓sqrt(9)*sqrt(-1)
=∓3i
Try problems a and d along the same lines. Post your results if you need confirmation.
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