What is the value of x

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

Can someone me with this? i’m not sure what to put for my equations.