Answer:
The answer is 3.
Step-by-step explanation:
Solution :
Finding the value of a square minus b square.
[tex]{\implies{\sf{a \: square \: minus \: b \: square}}}[/tex]
[tex]{\implies{\sf{{a}^{2} - {b}^{2}}}}[/tex]
[tex]{\implies{\sf{{2}^{2} - {1}^{2}}}}[/tex]
[tex]{\implies{\sf{{2 \times 2} - {1 \times 1}}}}[/tex]
[tex]{\implies{\sf{4 - 1}}}[/tex]
[tex]{\implies{\sf{\underline{\underline{3}}}}}[/tex]
Hence, the answer is 3.
