document.write( "Question 682089: seven years ago varun's age was five times the square of swati's age. three years hence swati's age will be two fifth of varun's age.find their present ages \n" ); document.write( "
Algebra.Com's Answer #423043 by lwsshak3(11628)\"\" \"About 
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seven years ago varun's age was five times the square of swati's age. three years hence swati's age will be two fifth of varun's age.find their present ages
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\n" ); document.write( "let x=swati's present age
\n" ); document.write( "7 yrs ago
\n" ); document.write( "x-7=swati's age
\n" ); document.write( "5(x-7)^2=5(x^2-14x+49)=varun's age
\n" ); document.write( "..
\n" ); document.write( "3 yrs hence or 4 yrs ago
\n" ); document.write( "x-4=swati's age
\n" ); document.write( "5(x^2-14x+49)+3=varun's age
\n" ); document.write( "swati's age will be two fifth of varun's age
\n" ); document.write( "x-4=2/5*5(x^2-14x+49)
\n" ); document.write( "x-4=2(x^2-14x+49)
\n" ); document.write( "x-4=2x^2-28x+98
\n" ); document.write( "2x^2-29x+102=0
\n" ); document.write( "(2x-12)(x-8.5)=0
\n" ); document.write( "x=6(reject) swati wasn't born 7 yrs ago
\n" ); document.write( "x=8.5 (swati's present age)
\n" ); document.write( "5(x-7)^2+7=5(1.5)^2+7=18.25 (varun's present age)
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