Asked by Steven

NOTE: before you answer this question, please be aware that there aren't meant to be any full stops after the '2' or the 'i=0'. Also the underscores '-' represent how the following number is meant to be a lower case number. The ^ represents root numbers. PLEASE HELP ME



Expand the following polynomial and write it in standard form:

2. 2
(∑ a_i x^i )(∑ b_j x^j )
i=0. j=0

Answers

Answered by bobpursley
(a0+a1*x+a2*x^2)(b0+b1*x+b2*x^2)
Now, rearrange them in descending powers of x

(a2x^2+a1x+ao)(b2x^2+b1x+bo) Now follow this example
http://image.tutorvista.com/cms/images/38/trinomial-multiplication.JPG
Next, multiply the second term of the first trinomial with each term of the second trinomial. Finally, multiply the third term of the first trinomial with each term of the second trinomial. Hence, the product of (2x2 + 2x + 1) and (3x2 + 5x + 2) is 6x4 + 16 x3 + 17x2 + 9x + 2.
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