document.write( "Question 280108: show that the values 0,1,-1 for x all satisfy (x-1)(x-1)+(x+1)(x+1)=2(x*x+1). Is this equation an identity? \n" ); document.write( "

Algebra.Com's Answer #203534 by richwmiller(17219) $\"\"$ $\"About$

You can put this solution on YOUR website!
using foil
\n" ); document.write( "(x-1)*(x-1)
\n" ); document.write( "x^2-2x+1
\n" ); document.write( "(x+1)*(x+1)
\n" ); document.write( "x^2+2x+1
\n" ); document.write( "adding together
\n" ); document.write( "2x^2-2x+2x+1+1
\n" ); document.write( "2x^2+2
\n" ); document.write( "2(x^2+1)
\n" ); document.write( "2(x*x+1)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );