document.write( "Question 125943: factoring: quadratic equations and completing the square
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document.write( "2a^2-5ab-3b^2=0\r
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document.write( "would i use complete the square to factor this? I'm not sure. Is there more than one way to do it? \n" );
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Algebra.Com's Answer #92302 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! 2a^2-5ab-3b^2=0 \n" ); document.write( "----------------- \n" ); document.write( "Use the AC Method \n" ); document.write( "Your Problem: \n" ); document.write( "AC = 2*-3 = -6 \n" ); document.write( "B = -5 \n" ); document.write( "--------------- \n" ); document.write( "Think of two numbers whose product = AC = -6 \n" ); document.write( "and whose sum is B = -5 \n" ); document.write( "--------------- \n" ); document.write( "The numbers are -6 and +1 \n" ); document.write( "---------------------------- \n" ); document.write( "Replace the B-term with the sum: -5ab = -6ab+ab to get: \n" ); document.write( "2a^2-6ab+ab-3b^2 = 0 \n" ); document.write( "--------------------------- \n" ); document.write( "Factor the 1st two terms and the last two terms separately to get: \n" ); document.write( "2a(a-3b)+b(a-3b) = 0 \n" ); document.write( "Factor again to get: \n" ); document.write( "(a-3b)(2a+b) = 0 \n" ); document.write( "----------------- \n" ); document.write( "At this point you have factored the left side of the original equation. \n" ); document.write( "------------------- \n" ); document.write( "Therefore: \n" ); document.write( "a = 3b or a = -b/2 \n" ); document.write( "==================== \n" ); document.write( "cheers, \n" ); document.write( "stan H. \n" ); document.write( " \n" ); document.write( " |