Respuesta :

Step-by-step explanation:

Given -

  1. a = 2
  2. b = -4

To Find -

  • Evaluate a² + b²

Then,

(2)² + (-4)²

= 4 + 16

= 20

Answer:

18

Step-by-step explanation:

Given

a + b² ( substitute a = 2 and b = - 4 into the expression )

= 2 + (- 4)² = 2 + 16 = 18