Question

Can you help me with this​

Answer 1

option A

Explanation:

X - 2Y = Z

`\left[\begin{array}{cc}b&a\\4&a\\\end{array}\right]-2\left[\begin{array}{ccc}c&d\\a&b\end{array}\right]=\left[\begin{array}{ccc}a&c\\16&b\end{array}\right] \\\\\left[\begin{array}{cc}b&a\\4&a\\\end{array}\right]-\left[\begin{array}{ccc}2c&2d\\2a&2b\end{array}\right]=\left[\begin{array}{ccc}a&c\\16&b\end{array}\right] \\\\`

4 - 2a = 16

-2a = 16 - 4

-2a = 12

a = 12/-2

a = -6

a - 2b = b

-6 - 2b = b

-6 = b + 2b

-6 = 3b

-6/3 = b

b = -2

b - 2c = a

-2 - 2c = -6

-2c = -6 +2

-2c = -4

c = -4/-2

c = 2

a - 2d = c

-6 - 2d = 2

-2d = 2 + 6

-2d = 8

d = 8/-2

d = -4