Polynomial expansion need help

Question

What is the answer to this my calculator is giving me different answers

$$(-0.2511x^3 + 0.5766x^2 + 0.1744X + 2.7)^2$$

I wished you had provided the different answers. – bobbym May 20 '14 at 16:04 — bobbym, May 20 '14 at 16:04

score 2 · Accepted Answer · answered May 20 '14 at 15:37

2

$$(-0.2511x^3 + 0.5766x^2 + 0.1744X + 2.7)^2\\ =0.0630512 x^6-0.289569 x^5+0.332468 x^4-0.0875837 x^3 X-1.35594 x^3+0.201118 x^2 X+3.11364 x^2+0.0304154 X^2+0.94176 X+7.29$$ By introductory polynomial multiplication. Anything else is incorrect.

Assuming $X=x$, the polynomial, expanded, is $$0.0630512 x^6-0.289569 x^5+0.244884 x^4-1.15482 x^3+3.14406 x^2+0.94176 x+7.29$$

answered May 20 '14 at 15:37

@Amzoti I'll edit my answer to include that as a case. – May 20 '14 at 15:38
@Amzoti See my edit. – May 20 '14 at 15:39
thank you i have an extended question to this can you please help me out, much appreciation! – user151764 May 20 '14 at 16:14

Polynomial expansion need help

1 Answers1