document.write( "Question 1127312: Solve by completing the square.
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document.write( "(When I do this, I get a LOT of fractions. I feel like I'm missing something big in this problem.)\r
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document.write( "8x^2+10x=3 \n" );
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Algebra.Com's Answer #743702 by greenestamps(13200)![]() ![]() 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( " \n" ); document.write( "Factor out the leading coefficient: \n" ); document.write( " \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( " \n" ); document.write( "Write the expression in parentheses as the square of a binomial, and simplify the expression on the right: \n" ); document.write( " \n" ); document.write( "Divide by 8 to get the squared binomial by itself: \n" ); document.write( " \n" ); document.write( "Take the square root of both sides, getting both positive and negative roots on the right: \n" ); document.write( " \n" ); document.write( "Solve the two equations to find the two roots of the original equation: \n" ); document.write( " \n" ); document.write( "The two roots of the equation are 1/4 and -3/2. \n" ); document.write( " |