**Question 1.Find the values of the determinants.**

**Question 2.**

**Question 3.Solution:**

Comparing with x + iy, we get x = 11, y = 52

**Question 4.Find the minors and cofactors of elements of the determinant D=**

**Question 5.**

Solution:

= 2(0 – 20) + 3(- 42 – 4) + 5(30 – 0) = 2(-20) + 3(- 46) + 5(30)

= 2(0 – 20) + 3(- 42 – 4) + 5(30 – 0) = 2(-20) + 3(- 46) + 5(30)

= -40-138+ 150 = -28

**Question 6.**