Friday

December 19, 2014

December 19, 2014

Posted by **Anonymous** on Wednesday, September 18, 2013 at 11:15am.

Factor the polynomials:

a) 3x^2 +19x - 40

b) x^4 - 25x^2

Simplify the expression completely:

(1/(x-h)^3 - 1/x^3)/8h

- Pre Calculus -
**bobpursley**, Wednesday, September 18, 2013 at 11:27amb. Difference of two squares, then one of those factors can be factored as a difference of two squares again. I can check your work.

a. What is ( x+8)(3x-5)

c. do some combination.

((x^3-(x-h)^3)/(8h(x^3*(x-h)^3)

now factor the numerator as a difference of two cubes. Doing it in my head, I see some reduction.

- Pre Calculus -
**Anonymous**, Wednesday, September 18, 2013 at 11:33amooh, nevermind I figured out how to do a) answer is 3(x-5)(x+8)....I forgot to move the 3 over

and b) uses the difference of squares formula so the answer is x^2(x-5)(x+5)

still can't figure out the third one though!

**Answer this Question**

**Related Questions**

Pre-Calculus - Hello, I have tried solving this using the rational roots theorem...

Calculus - Please help!! I keep solving this problem but I keep getting the ...

Physics - Several volcanoes have been observed erupting on the surface of one of...

Physics - I am doing my physics homework and am stuck on this one problem. can ...

Math - Hi, I am getting very frustrated. I am doing an online homework for ...

Calculus - Find the distance from point P<5,5,2> to the line x=0 , y=5-5t...

Algebra 2. - 16x^4+8x^3+17x^2+8x+1 I have tried it but i keep getting the wrong ...

Chemistry - H(f) Cl= 121.3 kj H(f) C= 716.7 H(f) CCl4= -95.7 calculate the ...

algebra 1 - -2/3z=-4/9 i tried to solve, but i keep on getting the wrong answer...

Pre Calculus - I keep trying to solve this by factring but I can't seem to get! ...