How to use the convolution method to multiply all linear factors together to find a new polynomial

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Yianni 2014-11-7

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回答： Image Analyst 2014-11-8

I have the polynomial: f(x) = x^7 - 4.75x^6 + 10.875x^5 - 20.125x^4 + 20x^3 + 1.75x^2 - 30x + 25

I need to use the convolution method to multiply all the linear factors of this polynomial together to find a new polynomial.

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Answer 1

Image Analyst 2014-11-8

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I don't know what that means, but you can see the coefficients and you can read the help about conv() function which does convolution. However, you have to have two functions to convolve, not one . There is a function called prod() that multiplies array elements together, eg

theProduct = prod([1, -4.75, 10.875, -20.125, 20, 1.75, 30, 25]);

Basically, I don't know what you want to do until you read this and clarify.