3 years ago

Help with this please?????

Mathematics

1 answer:

yanalaym [24]3 years ago

4 0

The answer is 110 degrees

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For which values of a does ???? a a − 4<br> a + 4 a<br> ???? have an inverse matrix?

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Answer:

A = $\dfrac{1}{16}\begin{bmatrix}a &-(a-4) \\ -(a+4) & a\end{bmatrix}$

Step-by-step explanation:

given,

Matrix =

A = $\begin{bmatrix}a &a-4 \\ a+4 & a\end{bmatrix}$

determinant of matrix

|A| = a×a - (a-4)(a+4)

|A| = a² - a² +16

|A| = 16

inverse of the matrix

to calculate inverse of two matrix interchange the term a₁₁ with a₂₂ and multiply the -ve with a₁₂ and a₂₁

the inverse is

A = $\dfrac{1}{16}\begin{bmatrix}a &-(a-4) \\ -(a+4) & a\end{bmatrix}$

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Step-by-step explanation:

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