document.write( "Question 1127312: Solve by completing the square.
\n" ); document.write( "(When I do this, I get a LOT of fractions. I feel like I'm missing something big in this problem.)\r
\n" ); document.write( "\n" ); document.write( "8x^2+10x=3
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Algebra.Com's Answer #743702 by greenestamps(13200)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "You are likely to get fractions when completing the square, except in \"nice\" problems....

\n" ); document.write( "\"8x%5E2%2B10x+=+3\"

\n" ); document.write( "Factor out the leading coefficient:

\n" ); document.write( "\"8%28x%5E2%2B%285%2F4%29x%29+=+3\"

\n" ); document.write( "Take half the coefficient of the x term (5/8), square it (25/64), and add 25/64 in the parentheses on the left, to complete the square. Note that you added 8*25/64 = 25/8 on the left side of the equation, so you need to add 25/8 on the right to keep the equation balanced.

\n" ); document.write( "(Note that the only time you will NOT get fractions in the process of completing the square is when half the coefficient of x is an integer.)

\n" ); document.write( "\"8%28x%5E2%2B%285%2F4%29x%2B25%2F64%29+=+3%2B25%2F8\"

\n" ); document.write( "Write the expression in parentheses as the square of a binomial, and simplify the expression on the right:

\n" ); document.write( "\"8%28x%2B%285%2F8%29%29%5E2+=+49%2F8\"

\n" ); document.write( "Divide by 8 to get the squared binomial by itself:

\n" ); document.write( "\"x%2B%285%2F8%29%5E2+=+49%2F64\"

\n" ); document.write( "Take the square root of both sides, getting both positive and negative roots on the right:

\n" ); document.write( "\"x%2B5%2F8+=+7%2F8\" OR \"x%2B5%2F8+=+-7%2F8\"

\n" ); document.write( "Solve the two equations to find the two roots of the original equation:

\n" ); document.write( "\"x+=+2%2F8+=+1%2F4\" OR \"x+=+-12%2F8+=+-3%2F2\"

\n" ); document.write( "The two roots of the equation are 1/4 and -3/2.
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