Question

no entiendo esta cuenta 2.(x^2-5)= √64

Answer 1

Explicación paso a paso:

$2(x {}^{2} - 5) = \sqrt{64} \\ 2x {}^{2} - 10 = 8 \\ 2x {}^{2} = 10 + 8 \\ 2x {}^{2} = 18 \\ x {}^{2} = \frac{18}{2} \\ x {}^{2} = 9 \\ x = \sqrt{9} \\ x = 3$