Question

a² + B²
______
A- B

A=2 B=-3

Answer 1

A² + B²
______
A- B

A=2 B=-3

2² + (-3)²
---------------
   2 - (-3)

4 + (+ 9)
-----------
   2 + 3

4 + 9           13
-------- = ----------
  5               5

Answer 2

$\frac{ A^{2} + B^{2} }{A-B}$

$\frac{2 ^{2} +(-3 )^{2} }{2-(-3)}$

$\frac{4+9}{2+3} =\boxed{\boxed{ \frac{13}{5} \ \ ou\ \ 2,6\ }}\ \ \ \ \ \ \ \ \ \ \ \ ok$