Given two matrices are equal .i.e, A = B.

We know that if two matrices are equal then the elements of each matrices are also equal.

∴a + 4 = 2a + 2

⇒ a – 2a = 2 – 4

⇒ – a = – 2

⇒ a = 2 …… (1)

And 3b = b² + 2

⇒ b² – 3b + 2 = 0

⇒ b² – 2b – b + 2 = 0

⇒ b(b – 2) – 1(b – 2) = 0

⇒ (b – 2)(b – 1) = 0

⇒ b = 2 or 1 …… (2)

And – 6 = b² – 10

⇒ b² = – 10 + 6

⇒ b² = – 4

⇒ b = ±2i(No real solution) …… (3)

∴ a = 2, b = 2 or 1