Question 1209237
<pre>
The dollar mark student posts again:</pre>Express (15 - 16i)(2 - 3i)$ in standard form.
The standard form of a complex number is the form a + bi, where a and b are real.<pre>Use FOIL
{{{(15)(2)+(15)(-3i)+(-16i)(2)+(-16i)(-3i)}}}

Multiply those, and combine like terms, 
Remember that i<sup>2</sup> = -1, 
so substitute -1 for i<sup>2</sup>.
combine terms again if necessary.
write the term without an i first,
and write the term with an i second.

Edwin</pre>