The number of square matrices of order 2 using numbers 1 and – 1 exactly once and the number 0 twice is:

If  p > 0 and  q < 0, then:

The rank of the matrix $$\begin{bmatrix}-1 & 2 & 5 \\2 & -4 & a - 4 \\1 & -2 & a + 1\end{bmatrix}\text{ is:} \\[12pt]$$​​

The solution set of $$|3 - 4x| \geq 9$$​ is:

The matrix which describes the rotation of x and y-axis through an angle θ about the origin is given by :

If P'(x', y') is the reflection of the point P(x, y) on the x-axis, then the matrix which describe the reflection of point P(x, y), in the x-axis is :

The matrix which describes the reflection of a point P(x, y) through the origin is:

If  $$n×n$$ matrix A has only one non-zero element, rank of  A is

The sum of the eigenvalues of the matrix $$\begin{pmatrix} 5 & 4 \\1 & 2\end{pmatrix}$$ is​

If $$A = \begin{pmatrix} \alpha & 0 \\1 & 1\end{pmatrix}, \quad B = \begin{pmatrix} 1 & 0 \\5 & 1\end{pmatrix}$$and $$A^2=B$$, then value of $$\alpha$$ is​

If $$I$$ be the $$2×2$$ identity matrix and $$A = \begin{pmatrix} 2 & -1 \\-1 & 2\end{pmatrix}$$, then $$A^2$$ is equal to​