document.write( "Question 764636: Write the product in standard form.
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document.write( "( 9 + 5i)( 9 + 8i) \n" );
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Algebra.Com's Answer #465555 by DrBeeee(684)![]() ![]() ![]() You can put this solution on YOUR website! Given: \n" ); document.write( "(1) (9+5i)*(9+8i) \n" ); document.write( "You multiply this the same as you FOIL two binomials, treating the real and imaginary parts as if they were two different variables. \n" ); document.write( "(2) (9+5i)*(9+8i) = 9*9 + 9*8i + 5i*9 + 5i*8i or after multiplying \n" ); document.write( "(3) (9+5i)*(9+8i) = 81 + 72i + 45i + 40i^2 and after adding the imaginary parts and using the fact that i^2 = -1 we get \n" ); document.write( "(4) (9+5i)*(9+8i) = 81 + 117i - 40 or after adding the real parts we get \n" ); document.write( "the final answer \n" ); document.write( "(5) (9+5i)*(9+8i) = 41 + 117i \n" ); document.write( " |