please simplify

(1.2x^3+4.5x^2-3.8x)+(-3.4x^3-4.7x^2+23)

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- Aug 17th 2011, 07:12 PMPandatwirler2simplify!
please simplify

(1.2x^3+4.5x^2-3.8x)+(-3.4x^3-4.7x^2+23) - Aug 17th 2011, 07:24 PMpickslidesRe: simplify!
The . indicate decimal points I assume?

If so simply group and add like terms $\displaystyle 1.2x^3+-3.4x^3 = -2.2x^3$ do the same for different orders of $\displaystyle x$ - Aug 17th 2011, 07:47 PMPandatwirler2Re: simplify!
What about this one.....

-4x(2x^3-6x^2-5x+1) - Aug 17th 2011, 08:12 PMSammySRe: simplify!
- Aug 17th 2011, 08:55 PMpickslidesRe: simplify!
- Aug 18th 2011, 12:09 PMPandatwirler2Re: simplify!
yes but how do you multiply -4x with 2x^3?

- Aug 18th 2011, 12:51 PMbigwaveRe: simplify!
you multiply the coefficients and add the exponents

$\displaystyle (-4x)(2x^3) = -8x^4$ - Aug 18th 2011, 06:47 PMWilmerRe: simplify!