Im looking to for the steps to solve this: 3(x^2 -2)² (2x-3)^2

apparent answer: 12x^6 - 36x^5 - 21x^4 +144x^3 - 60x^2 - 144x + 108

Printable View

- Mar 17th 2011, 06:02 PMreallylongnicknamefactoring polynomials
Im looking to for the steps to solve this: 3(x^2 -2)² (2x-3)^2

apparent answer: 12x^6 - 36x^5 - 21x^4 +144x^3 - 60x^2 - 144x + 108 - Mar 17th 2011, 06:04 PMpickslides
Is this expression equal to anything?

Or maybe something like this?

- Mar 17th 2011, 06:09 PMreallylongnickname
No, there is no = 0

- Mar 17th 2011, 06:21 PMpickslides
So you are looking to expand this? The word solve implies there is an equals sign somewhere in the problem.

This is the same as

Now use the distributive law in pairs - Mar 17th 2011, 06:23 PMDrSteve
If it's not equal to anything, then there is nothing to solve. Perhaps you are being asked to expand the expression. In this case you just need to do some multiplication using the distributive property several times.

To start you off, . - Mar 17th 2011, 07:10 PMreallylongnickname
for the 3(x^2 - 2)^2 = 3(x^2 - 2) (x^2 - 2) would be 3(x^4 - 4x^2 - 4) then distributed would be 3x^4 -12^2 - 12 but if I collect like terms, I do NOT come up with the correct answer. I must not be applying a correct rule.

- Mar 17th 2011, 07:19 PMtopsquark
- Mar 17th 2011, 07:54 PMreallylongnickname
Ahhh I see. The 3 is the last thing to multiply out. Thx topsquark, Dr Steve, and pickslides. I need to stay closer to rules and laws and maybe technique.

- Mar 20th 2011, 12:37 PMreallylongnicknameNew Q. Simplify rational expressions
Ok here is a new Q. (Simplify rational expressions)

(5x^3 -3x +4) + (x^3 -5x^2 -9) I know to first work out each side seperately. - Mar 20th 2011, 12:42 PMskeeter
- Mar 20th 2011, 12:43 PMtopsquark