Question

Pregunta cual es la solución 5x2=45

Answer 1

5x²= 45

x² = 9

x²- 9 = 0

(x - 3 )(x + 3) = 0

igualando a 0

x -3 = 0

x₁ = 3

x + 3= 0

x₂ = - 3