Respuesta :

Kandake

Answer:

x = -5 or x = 1

Step-by-step explanation:

[tex] 3{x}^{2} + 12x - 15 = 0 \\ {x}^{2} + 4x - 5 = 0 \\ (x + 5)(x - 1) = 0 \\ x = - 5 \: or \: x = 1[/tex]

hope this makes sense:)