document.write( "Question 1072205: I need to solve by completeing the square: ^ :means exponent
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document.write( " 7x^2 - 14x -56=0
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document.write( "I moved 56 to the other side: 7x^2-14x=56
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document.write( "Then i did (b/2)^2 and got 49 as a third term: 7x^2-14x+49
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document.write( "I tried to find what added could give me -14 and multiplied could give me 343
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document.write( "Did i do this wrong? plz help \n" );
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Algebra.Com's Answer #687081 by Boreal(15235) You can put this solution on YOUR website! You have to divide by the leading coefficient to make it 1, then you can proceed.\r \n" ); document.write( "\n" ); document.write( "7(x^2-2x)=7(8) \n" ); document.write( "x^2-2x=8, because both sides are multiplied by 7. \n" ); document.write( "(x2-2x+1)=8+1 \n" ); document.write( "(x+1)^2=3^2 \n" ); document.write( "(x+1)=+/-3 \n" ); document.write( "x=-1+/- 3 \n" ); document.write( "x=-2, 4 \n" ); document.write( " \n" ); document.write( " |