Question

calcule o valor numérico das expressões: A) a² + b² / a -b para a = - 3 e b = 3 B) x y - x² / √y quando x = - 1/10 e y = 1 /100

Answer 1

A)
-3² + 3² / -3 - 3
9 + 9 / -3 -3
18 / (-6) = -3

B)
-1 / 10 x 1 / 100 - (-1)² / 10 / √1/100
-1 / 10 x 1 / 100 - 1 / 10 / 0.1
-1 / 10 / 100 - 1 / 10 / 0.1
-0.1 / 100 - 1 / 10 / 0.1
-0.001 -1 / 10 / 0.1
-0.001 - 0.1 / 0.1
-0.001 - 1
-0.999