Question
Evaluate if possible $\left[\begin{array}{ll}1 & -2\end{array}\right]\left[\begin{array}{ll}-2 & 3 \\ -1 & 4\end{array}\right]$
✓
Answer
$[1-2]\left[\begin{array}{ll}-2 & 3 \\ -1 & 4\end{array}\right]=[-2+2,3-8]=\left[\begin{array}{ll}0 & -5\end{array}\right]$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following lists of numbers form an A.P.? If they form an A.P., find the common difference d and write the next three terms : – 2, 2, – 2, 2,…..
Find the reciprocal ratio of 4 : 7
If $x – 2$ is a factor of $2x^3 - x^2 - px - 2$.
Find the value of $p$
→Find the value of $p$
If the common difference of an A.P. is $– 3$ and the 18th term is $– 5,$ then find its first term.
→Every diameter of circle is an axis of the symmetry for the circle. Each of the figure below contain a circle or a part of a circle. State the number of axis of symmetry in each case and also indicate them.
From a rectangular solid of metal $42 \ cm$ by $30 \ cm$ by $20 \ cm,$ a conical cavity of diameter $14 \ cm$ and depth $24 \ cm$ is drilled out. Find: the weight of the material drilled out if it weighs $7 \ gm$ per $\ cm^3.$
→Wherever possible write of the following as a single matrix
$\left[\begin{array}{ll}1 & 2 \\ 3 & 4\end{array}\right]+\left[\begin{array}{cc}-1 & -2 \\ 1 & -7\end{array}\right]$
→$\left[\begin{array}{ll}1 & 2 \\ 3 & 4\end{array}\right]+\left[\begin{array}{cc}-1 & -2 \\ 1 & -7\end{array}\right]$
A die has 6 faces marked by the given numbers as shown below:
The die is thrown once. What is the probability of getting the smallest integer?
| 1 | 2 | 3 | - 1 | - 2 | - 3 |
$\left[\begin{array}{c}3 \\ 0 \\ -1\end{array}\right]$
→Discuss the nature of the roots of quadratic equations : $3 x^2-2 x+\frac{1}{3}=0$
→