document.write( "Question 925562: How would I solve the dimensions of a rectangle if the length is 3cm more than the width and the diagonal is 15cm?\r
\n" ); document.write( "\n" ); document.write( "I'm supposed to use factored form for the problem but I haven't been able to solve it. I know it has something to do with isolating w. \r
\n" ); document.write( "\n" ); document.write( "So far, I've subbed in w + 3 for the length and tried pythagorean theorem. But that answers keep coming up wrong. They should be 12 by 9.
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Algebra.Com's Answer #561598 by srinivas.g(540)\"\" \"About 
You can put this solution on YOUR website!
Let width be w cm
\n" ); document.write( "length = (w+3) cm
\n" ); document.write( "diagonal = 15 cm
\n" ); document.write( "as per pythagorean theorem
\n" ); document.write( " \"+w%5E2+%2B%28w%2B3%29%5E2+=15%5E2\"
\n" ); document.write( " \"+w%5E2%2B+%28w%2B3%29%2A%28w%2B3%29+=+225\"
\n" ); document.write( " \"+w%5E2+%2Bw%2A%28w%2B3%29%2B3%28w%2B3%29+=225\"
\n" ); document.write( " \"+w%5E2+%2Bw%2Aw%2Bw%2A3%2B+3%2Aw%2B3%2A3++=225\"
\n" ); document.write( " \"+w%5E2+%2Bw%5E2+%2B3w%2B3w%2B9+=225\"
\n" ); document.write( " \"+2w%5E2%2B6w%2B9+=225\"
\n" ); document.write( " move 225 to the right
\n" ); document.write( " \"+2w%5E2%2B6w%2B9-225+=0\"
\n" ); document.write( " \"+2w%5E2%2B6w-216=0\"
\n" ); document.write( " on dividing with 2 both sides
\n" ); document.write( " \"+w%5E2+%2B3w-108=0\"
\n" ); document.write( " \"+w%5E2%2B12w-9w-108=0\"
\n" ); document.write( " \"+w%28w%2B12%29-9%28w%2B12%29+=0\"
\n" ); document.write( " \"+%28w-9%29%28w%2B12%29++=0+\"
\n" ); document.write( " (w-9) =0 or (w+12 )= 0
\n" ); document.write( " w=9 or w=-12
\n" ); document.write( " w cannot be negative
\n" ); document.write( "so w= 9
\n" ); document.write( " l = w+3 = 12
\n" ); document.write( "so length = 12 cm
\n" ); document.write( " width = 9 cm\r
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