document.write( "Question 18095: Here's another one:
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document.write( "sqrt(13-x) = x-1\r
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Algebra.Com's Answer #8715 by venugopalramana(3286)![]() ![]() You can put this solution on YOUR website! sqrt(13-x) = x-1\r \n" ); document.write( "\n" ); document.write( "square both sides \n" ); document.write( "13-x=(x-1)^2=x^2+1-2x \n" ); document.write( "x^2+1-2x-13+x=0 \n" ); document.write( "x^2-x-12=0 \n" ); document.write( "find the product of coefficients of x^2 term(1 here)and constant term(-12 here)=-12..now find 2 factors for this whose sum is coefficient of x term(-1 here)..they are -4 and +3...so \n" ); document.write( "x^2-4x+3x-12=0 \n" ); document.write( "x(x-4)+3(x-4)=0 \n" ); document.write( "(x-4)(x+3)=0 \n" ); document.write( "so x=4 or -3 \n" ); document.write( " \n" ); document.write( " |