I need help understanding this!

The basic idea is that multiplying by 10 just moves the decimal point one place to the right.  It makes the number bigger.

4.8 x 10 = 48

4.8 x 10 x 10 = 48 x 10 = 480

Each time you multiply by another 10, the decimal point moves one more time.

The expression says you're going to multiply by 10 five times in a row.  So that will move the decimal point 5 places to the right.

So what do you get if you move the decimal in 4.8 five places to the right?

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1