document.write( "Question 1143149: find the area of the square if its side measures (4x+7) cm \n" ); document.write( "

Algebra.Com's Answer #763924 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+s+=+4x+%2B+7+\"$
\n" ); document.write( "The square of the side = the area of the square
\n" ); document.write( " $\"+s%5E2+=+%28+4x+%2B+7+%29%5E2+\"$
\n" ); document.write( " $\"+s%5E2+=+16x%5E2+%2B+56x+%2B+49+\"$
\n" ); document.write( "-------------------------------------
\n" ); document.write( "proof:
\n" ); document.write( "Say $\"+x+=+1%2F4+\"$
\n" ); document.write( " $\"+s+=+4%2A%281%2F4%29+%2B+7+\"$
\n" ); document.write( " $\"+s+=+8+\"$
\n" ); document.write( " $\"+s%5E2+=+64+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+s%5E2+=+16%2A%281%2F4%29%5E2+%2B+56%2A%281%2F4%29+%2B+49+\"$
\n" ); document.write( " $\"+s%5E2+=+1+%2B+14+%2B+49+\"$
\n" ); document.write( " $\"+s%5E2+=+64+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

\n" );