Friday

November 28, 2014

November 28, 2014

Posted by **Algebra 2** on Thursday, April 2, 2009 at 9:22pm.

X^4-13X^2+36

How do I factor this using algebra not just gussing and checking this times this and what number plus what number gives you these numbers

how do i factor that wihtout playing one of those games were you like guess and check your like taught in nineth grade thanks

- Algebra 2 -
**Reiny**, Thursday, April 2, 2009 at 10:28pmpart of the "game" that I play is to realize that both brackets have to start with x^2 to have x^4 at the front and x^2's in the middle, so ...

(x^2 - ...)(x^2 - ...)

looking at the +36 at the end, I know my 2 numbers must both have the same sign, since I see a negative in the middle, they must be negative.

Now what two factors of 36 have a sum of 13

Gee, my game tells me it must be 9 and 4

so

(x^2 - 9)(x^2 - 4)

at this point you have to recognize the difference of square for both of those.

final result:

(x+3)(x-3)x+2)x-2)

thanks for playing.

**Answer this Question**

**Related Questions**

algebra2 - Solve each of the following quadratic equations. can some explain how...

math/algebra - subtract. express in simplest form 13x/30 - 4x/ 15 = factor the ...

Algebra - ello i need help factoring I haven't had factorin sense Algebra one ...

Algebra - Can you pleas Solve the quadric equation step by step 4x square =13x+...

Algebra - Hello all - I would like to check my work on 2 problems. Solve by ...

ALGEBRA - Could you explain how to factor the following trinomials : x2 + bx + c...

Algebra - I have a few more questions that I either need help with or just need ...

Algebra - Factor 5x^2-13x-6 I got (5x-3)(x-2) as the answer, but I know that is ...

Algebra 2 - I need help factoring... I refuse to just sit there and play little ...

Algebra II - I have some questions on my assignment, if you dont mind could you ...