Respostas

  • Usuário do Brainly
2014-05-22T17:28:31-03:00
A=b*h

A=64
b=(x+6)
h=(x-6)


64=(x+6)*(x-6)

64=x^2-6^2
64=x^2 -36
64+36=x^2
x^2=100
x=Raiz de 100
x=10
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