Question

a - b = 5

a. b = 35

a² + b² = ?​

Answer 1

Resposta:

a = 5 + b

b(5 + b) = 35

5b + b² = 35

b² = 35 - 5b

a(a - 5) = 35

a² - 5a = 35

a² = 35 + 5a

a² + b² =

35 + 5a + 35 - 5b =

70 + 5a - 5b

70 + 5(5 + b) - 5b

70 + 25 + 5b - 5b

95