## Algebra and Trigonometry 10th Edition

$\bf{True}$
The general form of a matrix of order $3 \times 3$ is: $\begin{bmatrix} a & b & c \\ d & e & f \\ g & h& i \end{bmatrix}=a(ei-fh) -b(di-fg)+c(dh-eg)$ Now,$\begin{bmatrix} 1 & 2 & 4 \\ 4 & 2 & 1 \\ 4 & 6& 6 \end{bmatrix}= \begin{bmatrix} 1 & 2 & 4 \\ 4 & 2 & 1 \\ 2 & 3& 1 \end{bmatrix}+\begin{bmatrix} 1 & 2 & 4 \\ 4 & 2 & 1 \\ 2 & 3& 5 \end{bmatrix}$ or, $30=27+3$ or, $30=30$ (True)