Answer:
3x^2+2x+8
Step-by-step explanation:
1. x^2+2x^2=3x^2
2. -3x+5x=2x
3.1+7=8
Eight cubes is written as 8^3
This means you multiply 8 by itself 3 times:
8 x 8 x 8 = 512
independent variable input
