document.write( "Question 30237: Question:
\n" ); document.write( "Solve for y: y^4-4y^2=40y-10y^3\r
\n" ); document.write( "\n" ); document.write( "y=________ or y+_________ or y= _____________ or y= _______________\r
\n" ); document.write( "\n" ); document.write( "Possible Answers:
\n" ); document.write( "(a) 1, 10, 2, -2
\n" ); document.write( "(b) 0, -10, -2, 4
\n" ); document.write( "(c) 0, -10, 2, -2
\n" ); document.write( "(d) 0, 10, -2, -4\r
\n" ); document.write( "\n" ); document.write( "Please help and be specific as to which answer is correct. \n" ); document.write( "
Algebra.Com's Answer #17260 by sdmmadam@yahoo.com(530)\"\" \"About 
You can put this solution on YOUR website!
Solve for y:
\n" ); document.write( "y^4-4y^2=40y-10y^3 ----(1)
\n" ); document.write( "(taking all the terms to the left side changin sign while changing side)
\n" ); document.write( "y^4+10y^3-4y^2-40y=0
\n" ); document.write( "y[y^3+10y^2-4y-40]=0
\n" ); document.write( "y[y^2(y+10)-4(y+10)] = 0
\n" ); document.write( "y[y^2p-4p] = 0 where p =(y+10)
\n" ); document.write( "yp(y^2-4)=0
\n" ); document.write( "y(y+10)(y+2)(y-2) = 0
\n" ); document.write( "Therefore y =0,(y+10) = 0, (y+2) = 0, (y-2) = 0
\n" ); document.write( "That is y = 0, y =-10, y =-2, y = 2\r
\n" ); document.write( "\n" ); document.write( "Which is your choice (c) 0, -10, 2, -2\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );