document.write( "Question 105217: i have been working on the problem and not figuring out where they got there answer if someone could explain it to me...... (3x+7)exponent of 2 outside of () \n" ); document.write( "
Algebra.Com's Answer #76580 by checkley75(3666)\"\" \"About 
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\n" ); document.write( "(3X+7)^2=(3X+7)(3X+7) OR
\n" ); document.write( "3X+7
\n" ); document.write( "3X+7 NOW MULTIPLY USING THE FOIL PROCESS.
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\n" ); document.write( "9X^2+21X+21X+49
\n" ); document.write( "9X^2+42X+49
\n" ); document.write( "FOIL STANDS FOR FIRST, OUTER, INNER & LAST.
\n" ); document.write( "THIS IS THE ORDER TO MULTIPLY SO YOU DON'T MISS NOR ANY ONE TERM TWICE.
\n" ); document.write( "FIRST=(3X+7)(3X+7) 3X*3X=9X^2
\n" ); document.write( "OUTER=(3X+7)(3X+7) 3X*7=21X
\n" ); document.write( "INNER=(3X+7)(3X+7) 7*3X=21X
\n" ); document.write( "LAST=(3X+7)(3X+7) 7*7=49
\n" ); document.write( "THAT'S WHY YOU HAVE 2 (21X) TERMS DUE TO THE OUTER & THE INNER MULTIPLICATIONS. \n" ); document.write( "
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