Question 369555
3i(7-9i)
First, use the Distributive Property to multiply:
{{{21i - 27i^2}}}
Since {{{i^2 = -1}}} this becomes:
21i - 27(-1)
which simplifies to
21i + 27
Since standard form has the real part first, we'll use the Commutative Property of Addition to reorder the expression:
27 + 21i