Here, it is given that I is a 2 × 2 unit matrix

So,

So, given equation becomes

Comparing the matrices, we get

1 + 2x = 1 …(i)

and y + 2 = 0 …(ii)

Solving eq. (i), we get

1 + 2x = 1

⇒ 2x = 0

⇒ x = 0

Solving eq. (ii), we get

y + 2 = 0

⇒ y = -2

Hence, the value of x = 0 and y = -2