## anonymous 4 years ago Factorize x^4-11x^2-1

1. anonymous

sory its x^4-11x^2+1

2. campbell_st

sorry I don't think it factorises.... may be a typo

3. anonymous

It is a quadratic equation where x^2 = y. Use the quadratic formula to figure the roots.

4. campbell_st

but then you have u^2 - 11u + 1 which won't factorise

5. anonymous

don't rely only on "factorizing" by ease. Quadratic formula does generate factors you know.

6. Akshay_Budhkar

it will factorize, $b^2-4ac >0$

7. campbell_st

lol..this is strange as the solution is $(x + (11 +\sqrt{117})/2) (x + (11 - \sqrt{117})/2)$ lol...

8. campbell_st