Question

resolva a equaçao imcompleta sendo U=R -64+4x²=0

Answer 1

-64+4x^2
4x^2-64=0
4x^2=0+64
4x^2=64
x^2=64/4
x^2=16
x= raiz de 16
x=-/+4

Answer 2

- 64 + 4r² = 0
- 64 = - 4r² (-1)
64 = 4r² (:4)
16 = r²
r² = 16
r = √16
r = +/- 4
r = + 4 e r = - 4