Respuesta :

Answer:

- 42

Step-by-step explanation:

given the expression

1m² - 71 + n²

= m² - 71 + n² ← substitute m = - 2 and n = 5 into the expression

= (- 2)² - 71 + 5²

= 4 - 71 + 25

= - 67 + 25

= - 42