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Given:
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\n" ); document.write( "(6 + 8i) - (-7 + i)
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\n" ); document.write( "The first set of parentheses is preceded by a plus sign (you can presume that because
\n" ); document.write( "there is no sign actually shown). Parentheses that are preceded by a + sign (or by no sign)
\n" ); document.write( "can be removed without any change to the terms they contain. This changes the given
\n" ); document.write( "problem to:
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\n" ); document.write( "6 + 8i - (-7 + i)
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\n" ); document.write( "Notice that the remaining set of parentheses is preceded by a minus sign. The rule is that
\n" ); document.write( "you can remove these parentheses if you change the signs of the terms inside the parentheses.
\n" ); document.write( "Following this rule leads to the given expression now becoming:
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\n" ); document.write( "6 + 8i + 7 - i
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\n" ); document.write( "Now you deal with the \"regular\" integer terms separately from the terms containing \"i\".
\n" ); document.write( "In other words you can combine the +6 and +7 to get +13. Then you add the 8i and the -i
\n" ); document.write( "to get +7i.
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\n" ); document.write( "The answer to your problem is the combination of these two terms and it is:
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\n" ); document.write( "13 + 7i.
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\n" ); document.write( "Hope this helps you to work your way through this problem and helps you understand
\n" ); document.write( "how the process works.
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