document.write( "Question 256125: how do you factor the polynomial x^4-8x^2-9 \n" ); document.write( "
Algebra.Com's Answer #188290 by drk(1908)![]() ![]() ![]() You can put this solution on YOUR website! We are given \n" ); document.write( "(i) \n" ); document.write( "step 1 - set up a dummy variable like U = x^2. If U = x^2, then U^2 = x^4. \n" ); document.write( "Step 2 - substitute the dummy variable into the equation to get \n" ); document.write( "(ii) \n" ); document.write( "step 3 - factoring we get \n" ); document.write( "(iii) \n" ); document.write( "step 4 - replace U with x^2 to get \n" ); document.write( "(iv) \n" ); document.write( "step 5 - notice the difference of squares. We can factor that to get \n" ); document.write( "(v) |