document.write( "Question 550094: Solve: x2-20x+100=0 \n" ); document.write( "
Algebra.Com's Answer #358427 by mathstutor458(57)\"\" \"About 
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x2-20x+100=0
\n" ); document.write( "=>x2-10x-10x+100=0
\n" ); document.write( "=>x(x-10)-10(x-10)=0
\n" ); document.write( "=>(x-10)(x-10)=0
\n" ); document.write( "=>x-10=0,x-10=0
\n" ); document.write( "=>x=10,10 -- answer\r
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\n" ); document.write( "\n" ); document.write( " (or)
\n" ); document.write( "a^2-2ab+b^2=(a-b)^2 (formula)
\n" ); document.write( "since our equation is also in the same form
\n" ); document.write( "x^2-20x+100=x^2-2*x*10+10^2
\n" ); document.write( " =(x-10)^2
\n" ); document.write( "(x-10)^2=0 (from the given equation)
\n" ); document.write( "=> x-10=0,x-10=0
\n" ); document.write( "=>x=10,10
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