Question

como calcular a conta 9x²=25 

Answer 1

$9 x^{2}=25$

$x^{2}= \frac{25}{9}$

$x= \sqrt{ \frac{25}{9} }$

$x= +\frac{5}{3}$

$x =- \frac{5}{3}$

Answer 2

Resposta:

9x² = 25 ⬅ Divida tudo por 9.

x² = 25/9

x² = ± √{25/9}

x = ± 5/3

x = - 5/3

x = 5/3

S {x₁ = - 5/3 , x₂ = 5/3}