document.write( "Question 203051This question is from textbook
\n" ); document.write( ": I don't understand these Please help Thanks,
\n" ); document.write( "Solve by completing the square
\n" ); document.write( "1. x^2 - 6x = 16
\n" ); document.write( "I get (6/2)^2 = 9/4 = (x-9/4)^2 then I am lost.\r
\n" ); document.write( "\n" ); document.write( "2. 2x^2 - 3x + 1 = 0 I get as far as
\n" ); document.write( " 2^2 - 3x =1
\n" ); document.write( " x^2 3/2 = 1/2
\n" ); document.write( " x^2 9/4 = 1/2 Now I am lost\r
\n" ); document.write( "\n" ); document.write( "3. x^2 - x - 1 = 0 Is this just {1,-1}\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #153176 by KY(1) $\"\"$ $\"About$

You can put this solution on YOUR website!
X^2 - 6X = 16
\n" ); document.write( "Complete the square in the left
\n" ); document.write( "X^2 - 6X + 9 - 9 = 16
\n" ); document.write( "(X-3)^2 - 9 = 16
\n" ); document.write( "(X-3)^2 = 25
\n" ); document.write( "(X-3)^2 = 5^2\r
\n" ); document.write( "\n" ); document.write( "so
\n" ); document.write( "X-3 = 5 ===> X = 8
\n" ); document.write( "or
\n" ); document.write( "X-3 = -5 ===> X = -2\r
\n" ); document.write( "\n" ); document.write( "Answer : X = -2 or 8 \n" ); document.write( "

\n" );