document.write( "Question 121335This question is from textbook Demana, Waits, Foley, Kennedy Precalculus Graphical, Numerical, Algebraic
\n" ); document.write( ": Can you please help me understand the method of arriving at the answer of this problem? Thank you.\r
\n" ); document.write( "\n" ); document.write( "In my textbook this was the exercise question
\n" ); document.write( " Write the product in standard form:
\n" ); document.write( "(2+3i)(2-i) \r
\n" ); document.write( "\n" ); document.write( "The answer in the back of the book was X= -4 +or- the sqrt of the fraction 8/3.\r
\n" ); document.write( "\n" ); document.write( "I don't understand how they arrived at this answer.
\n" ); document.write( "

Algebra.Com's Answer #89046 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
2+3i
\n" ); document.write( "2-i
\n" ); document.write( "----------------------------------------
\n" ); document.write( "4+6i-2i-3i^2 (i^2)=-1
\n" ); document.write( "4-4i-3*-1
\n" ); document.write( "4-4i+3
\n" ); document.write( "7-4i ANSWER.
\n" ); document.write( "
\n" ); document.write( "
\n" );