| * 20 r 2&4 - 5 & - 1 |

| * 20 r 2&4 - 5 & - 1 | = 2( - 1) - ( - 5)(4) = - 2 + 20 = 18

Determinants — Class 12 Maths Solution

ncert exercise SA NCERT,Ex.4.1,Q.1,Page.108

Question

$\left| {\begin{array}{rrrrrrrrrrrrrrrrrrrr}2&4\\{ - 5}&{ - 1}\end{array}} \right|$

Step-by-step Solution

$\left| {\begin{array}{rrrrrrrrrrrrrrrrrrrr}2&4\\{ - 5}&{ - 1}\end{array}} \right| = 2( - 1) - ( - 5)(4) = - 2 + 20 = 18$

NCERT & Exemplar solution for CBSE Class 12 Mathematics, Determinants. Curated by Sachin Sharma. Free for all students.