document.write( "Question 541506: (5x-1)^2\r
\n" ); document.write( "\n" ); document.write( "I know the answer is 25x^2-10x+1\r
\n" ); document.write( "\n" ); document.write( "But when I try to solve I only come up with 25x^2+1
\n" ); document.write( "I don't understand where the -10x comes from, \r
\n" ); document.write( "\n" ); document.write( "I appreciate any help,
\n" ); document.write( "thank you!! \n" ); document.write( "

Algebra.Com's Answer #354194 by friesr(113) $\"\"$ $\"About$

You can put this solution on YOUR website!
The perfect square factoring formula is:\r
\n" ); document.write( "\n" ); document.write( " $\"%28a+%2B+b%29%5E2+=+a%5E2+%2B+2ab+%2B+b%5E2%0D%0A\"$ \r
\n" ); document.write( "\n" ); document.write( "---\r
\n" ); document.write( "\n" ); document.write( "Your problem:
\n" ); document.write( " $\"%285x-1%29\"$
\n" ); document.write( "---\r
\n" ); document.write( "\n" ); document.write( " $\"%285%5E2%29+%28x%5E2%29+%2B+2%285%29%28-1%29%28x%29+%2B+%28-1%29%5E2\"$ \r
\n" ); document.write( "\n" ); document.write( "---
\n" ); document.write( "Your answer:
\n" ); document.write( " $\"25x%5E2+-+10x+%2B+1\"$
\n" ); document.write( "===\r
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\n" ); document.write( "\n" ); document.write( "You may want to note these formulas for the future:
\n" ); document.write( "1. $\"a%5E2+-+b%5E2+=+%28a-b%29%28a%2Bb%29\"$ Difference of squares
\n" ); document.write( "---
\n" ); document.write( "2. $\"a%5E2+%2B+2ab+%2B+b%5E2+=+%28a%2Bb%29%5E2\"$ Perfect square
\n" ); document.write( "---
\n" ); document.write( "3. $\"a%5E2+-+2ab+%2B+b%5E2+=+%28a-b%29%5E2\"$ Perfect square
\n" ); document.write( "---
\n" ); document.write( "4. $\"a%5E3+-+b%5E3+=+%28a-b%29%28a%5E2+%2B+ab+%2B+b%5E2%29\"$ Difference of cubes
\n" ); document.write( "---
\n" ); document.write( "5. $\"a%5E3+%2B+b%5E3+=+%28a%2Bb%29%28a%5E2+-+ab+%2B+b%5E2%29\"$ Sum of cubes\r
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