How do I find

Engineering

Mathematics

Introduction to Determinants

Question

How do I find $A = [\begin{array}{ccc} 1 & 2 & - 2 \\ - 1 & 3 & 0 \\ 0 & - 2 & 1 \end{array}] = ∣ A ∣ = ?$

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

A = [\begin{array}{ccc} 1 & 2 & - 2 \\ - 1 & 3 & 0 \\ 0 & - 2 & 1 \end{array}]

∴ |A| = 1(3 × 1) – ( – 2 × 0) – 2( – 1 – 0) + (– 2) (2 – 0)

= 1(3) + 2 – 4

= 5 – 4

= 1

Please subscribe our Youtube channel to unlock this solution.