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# hmmthingness

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well i know how to put a matrix into web2.0, how do i find the whole number things of it if it were a system of equations?

$$\begin{bmatrix} -8 && 4 && -2 && 1 && 1 \\ 0 && 0 && 0 && 1 && 5 \\ 8 && 4 && 2 && 1 && 9 \\ 27 && 9 && 3 && 1 && 36 \\ \end{bmatrix}$$

i need to know the values of the variables in this. format is

$$ax^3 + bx^2 +cx +d =y$$

also, the numbers in the matrix are the values that go onto the variables

anyone have my answer?

idk how to explain any better...

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#1
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This is "solvable"  by at least two methods that I know of OBT, but it can be a little cumbersome with matrixes that are larger than 3 x 3

Here's a website that will help you : http://matrix.reshish.com/matrixMethod.php

Click on the tab that says  "Inverse Matrix Method"  and choose the matrix dimension  [ this one is "4"]......hit "Set Matrix" and a matrix will come up....you can fill in the coefficients and then hit "Solve"

The solution to this system is

x^3  =  5/3

x^2 = 0

x = -14/3

d  = 5

CPhill  Dec 6, 2017

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