document.write( "Question 91729: And the last one I'm stuck on, solve by completing the square. Thanks! :)
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document.write( "10x^2=4x+7
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document.write( "a. 2/5 +or- square root 74/5
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document.write( "b. 2/5 +or- square root 86/5
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document.write( "c. 1/5 +or- square root 74/10 \n" );
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Algebra.Com's Answer #66622 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "10x^2=4x+7 ... 10x^2-4x-7=0\r \n" ); document.write( "\n" ); document.write( "completing the square - step-by-step ... for ax^2+bx+c=0\r \n" ); document.write( "\n" ); document.write( "1) by dividing or multiplying, set the coefficient of the squared term equal to one ... x^2+(b/a)x+(c/a)=0\r \n" ); document.write( "\n" ); document.write( "2) by adding or subtracting, set the constant term (c/a) equal to zero ... x^2+(b/a)x=-(c/a)\r \n" ); document.write( "\n" ); document.write( "3) add the square of one half of the x coefficient to both sides ... x^2+(b/a)x+(b/(2a))^2=-(c/a)+(b/(2a))^2\r \n" ); document.write( "\n" ); document.write( "4) take the square root of both sides ... \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x-(1/5)= |