document.write( "Question 740620: There's two squares. Ones bigger than the other. The area of the bigger square is twice the area of the smaller. The total perimeter of the squares together is 16 inches. What's the side lengths of the larger square? \n" ); document.write( "
Algebra.Com's Answer #451649 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Let \"+s+\" = the side of the bigger square
\n" ); document.write( "Let \"+t+\" = the side of the smaller square
\n" ); document.write( "The area of the bigger square is \"+s%5E2+\"
\n" ); document.write( "The area of the smaller square is \"+t%5E2+\"
\n" ); document.write( "given:
\n" ); document.write( "(1) \"+s%5E2+=+2t%5E2+\"
\n" ); document.write( "(2) \"+4s+%2B+4t+=+16+\" in
\n" ); document.write( "-------------------
\n" ); document.write( "(2) \"+s+%2B+t+=+4+\"
\n" ); document.write( "(2) \"+t+=+4+-+s+\"
\n" ); document.write( "Substitute (2) into (1)
\n" ); document.write( "(1) \"+s%5E2+=+2%2A%28+4-s+%29%5E2+\"
\n" ); document.write( "(1) \"+s%5E2+=+2%2A%28+16+-+8s+%2B+s%5E2+%29+\"
\n" ); document.write( "(1) \"+s%5E2+=+32+-+16s+%2B+2s%5E2+\"
\n" ); document.write( "(1) \"+s%5E2+-+16s+%2B+32+=+0+\"
\n" ); document.write( "Use the quadratic formula
\n" ); document.write( "\"+s+=+%28-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29+\"
\n" ); document.write( "\"+a+=+1+\"
\n" ); document.write( "\"+b+=+-16+\"
\n" ); document.write( "\"+c+=+32+\"
\n" ); document.write( "\"+s+=+%28-%28-16%29+%2B-+sqrt%28+%28-16%29%5E2+-+4%2A1%2A32+%29%29+%2F+%282%2A1%29+\"
\n" ); document.write( "\"+s+=+%28+16+%2B-+sqrt%28+256++-+128+%29%29+%2F+2+\"
\n" ); document.write( "\"+s+=+%28+16+%2B-+sqrt%28+128+%29%29+%2F+2+\"
\n" ); document.write( "\"+s+=+%28+16+%2B-+sqrt%28+2%2A64+%29%29+%2F+2+\"
\n" ); document.write( "\"+s+=+%28+16+%2B-+8%2Asqrt%28+2+%29%29+%2F+2+\"
\n" ); document.write( "\"+s+=+%28+8+%2B+4%2A1.414+%29+\"
\n" ); document.write( "\"+s+=+8+%2B+5.656+\"
\n" ); document.write( "\"+s+=+13.656+\" ( this result must be discarded, since it's greater than 4 )
\n" ); document.write( "and
\n" ); document.write( "\"+s+=+%28+8+-+5.656+%29+\"
\n" ); document.write( "\"+s+=+2.344+\"
\n" ); document.write( "----------------
\n" ); document.write( "and,
\n" ); document.write( "\"+t+=+4+-+s+\"
\n" ); document.write( "\"+t+=+4+-+2.344+\"
\n" ); document.write( "\"+t+=+1.656+\"
\n" ); document.write( "--------------
\n" ); document.write( "The side of the larger square is 2.344 inches
\n" ); document.write( "check:
\n" ); document.write( "(1) \"+s%5E2+=+2t%5E2+\"
\n" ); document.write( "(1) \"+2.344%5E2+=+2%2A1.656%5E2+\"
\n" ); document.write( "(1) \"+5.494+=+2%2A2.742+\"
\n" ); document.write( "(1) \"+5.494+=+5.485+\"
\n" ); document.write( "This is off a little too much- If you redo the
\n" ); document.write( "math to another decimal place, I think it will
\n" ); document.write( "come out right\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );