Use a vertical format to subtract the polynomials.
3x2 - 2x + 2
- (7x2 + 2x - 3)

Subtracting the polynomials we will get:

Step-by-step explanation:

We need to u se a vertical format to subtract the polynomials.

The polynomials given are:

Now, solving

For, subtraction, the sign of the terms will be changed. - will convert to + because (-)(-) = + and positive sign will be converted to negative (-)(+) = -

The sign with the resulting term will be the sign of term that has greater coefficient. For example if we are subtracting 3x^2 and (-7x^2), the result will be -4x^2 because 7 has negative sign. (term has greater coefficient)

So, Subtracting the polynomials we will get:

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.