Question

multiplicative inverse of complex number( - 2,1)

Answer 1

$\huge\underline{\overline{\mid\star{\mathfrak{\red{ Solution:—}}\star\mid}}}$

The complex number represented by the point

(-2 , 1 ) → -2 + i

Now, the multiplicative inverse of -2 + i

→ $\frac{1}{ - 2 + i} \\ \\ = \frac{ - 2 - i}{( - 2 + i)( - 2 - i)} \\ \\ = \frac{ - 2 - i}{( { - 2)}^{2} - {i}^{2} } \\ \\ = \frac{ - 2 - i}{4 - ( - 1)} \\ \\ = \frac{ - 2 - i}{4 + 1} \\ \\ = \frac{ - 2 - i}{5}$

$\Large{\colorbox{pink}{\underline{\underline{♪Answer♪:—\:\:(-2-i)/5} }}}$

Answer 2

Answer:

(1,2)

Step-by-step explanation:

multiplication inverse.of complex no.