document.write( "Question 74837: (x+5)(x+7)=0 solving quadratic equtions by factoring \n" ); document.write( "

Algebra.Com's Answer #53764 by jim_thompson5910(35256) $\"\"$ $\"About$

You can put this solution on YOUR website!
Set each factor equal to zero to solve for x
\n" ); document.write( " $\"x%2B5=0\"$
\n" ); document.write( " $\"x=-5\"$ There's one answer
\n" ); document.write( " $\"x%2B7=0\"$
\n" ); document.write( " $\"x=-7\"$ There's another answer
\n" ); document.write( "So the solutions are x=-5 or x=-7
\n" ); document.write( "

\n" ); document.write( "Check:
\n" ); document.write( " $\"%28-5%2B5%29%28x%2B7%29=0+\"$ Plug in x=-5
\n" ); document.write( " $\"%280%29%28x%2B7%29=0+\"$
\n" ); document.write( " $\"0=0+\"$ works
\n" ); document.write( " $\"%28x%2B5%29%28-7%2B7%29=0+\"$ Plug in x=-7
\n" ); document.write( " $\"%28x%2B5%29%280%29=0+\"$
\n" ); document.write( " $\"0=0+\"$ works \n" ); document.write( "

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