polynomial help #3

[dmaben]

evaluate the expression 2a-3b+c+d if... -2x^3+5x^2-4/x+2 = ax^2+bx+c+d/x+2
once again i dont know where to start?

 

[Deleted member 4993]

evaluate the expression 2a-3b+c+d if... -2x^3+5x^2-4/x+2 = ax^2+bx+c+d/x+2
once again i dont know where to start?

You wrote:

\(\displaystyle -2x^3 \ + \ 5x^2 \ - \ \frac{4}{x} \ + \ 2 \ = \ ax^2 \ + \ bx \ + \ c \ + \ \frac{d}{x} \ + \ 2\)

Is that correct?

If not - please correct your post using proper grouping symbols (remembering PEMDAS).

 

[mmm4444bot]

The grouping symbols Subhotosh mentions are parentheses around numerators and/or denominators which are polynomials with two or more terms.

EG:

5/x+1 means 5/x plus 1

5/(x + 1) means 5 over (x + 1)

In the former, the denominator is x. In the latter, the denominator is x + 1.

Grouping symbols make it clear what's in the numerator and what's in the denominator.