Question

Se a= 1-2raiz de 2; b= 1+5raiz de 2; c= 2-7raiz de 2, calcule o valor de a+b+c e a-b-c

Answer 1

Ola Anaclara 

a = 1 - 2√2
b = 1 + 5√2
c = 2 - 7√2

a + b + c = 1 - 2√2 + 1 + 5√2 + 2 - 7√5 = 4 - 4√2

a - b - c = 1 - 2√2 - 1 - 5√2 - 2 + 7√2 = -2 

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