Question

If a=12 and b= 16 find a_b and a+b

Answer 1

I did not understand your first question.

a+b= 12+16= 38

Answer 2

Hola... ❤️

⇒ a = 12

⇒ b = 16

So,

( a - b ) ( a + b )

⇒ ( 12 - 16 ) ( 12 + 16 )

⇒ - 4 × 28

⇒ -112