Choose the value of the x determinant (Dx) in the following system.
2x-3y=5
4x+2y=7

Question

Choose the value of the x determinant (Dx) in the following system.
2x-3y=5
4x+2y=7

anonymous · Answer

do you know what is "x determinant" ?

anonymous · Answer

nopee :/

anonymous · Answer

I think you can take your 2x2 matrix = A. If that is true then you can use ad-bc to solve for the determinant. I'm not familiar with seeing 2x2 = something then figuring out determinant.

anonymous · Answer

im still confused..

unklerhaukus · Answer

$$|\mathbf M|=\begin{vmatrix}a&b\c&d\end{vmatrix}=(a\times d)-(c\times b)$$

tkhunny · Answer

It is usually this:

$D = \left|\begin{matrix}2 & -3 \ 4 & 2\end{matrix}\right|$

$D_{x} = \left|\begin{matrix}5 & -3 \ 7 & 2\end{matrix}\right|$

$D_{y} = \left|\begin{matrix}2 & 5 \ 4 & 7\end{matrix}\right|$

See where the constant terms are substituted for the coefficients in the subscripted versions.

anonymous · Answer

okay thank you