Please help!! What Find the Error and explain why it is wrong!

First image attached

The error was done in Step E, because student did not multiply by the negative sign in numerator. Step E must be .

Second image attached

The error was done in Step C, because the student omitted the of the algebraic identity . Step C must be

Step-by-step explanation:

First image attached

The error was done in Step E, because student did not multiply by the negative sign in numerator. The real numerator in Step E should be:

Hence, Step E must be .

Second image attached

The error was done in Step C, because the student omitted the of the algebraic identity . Step C must be

And further steps are described below:

Step D

Which according to the Quadratic Formula, represents a polynomial with complex roots. That is: (, , )

(Conjugated complex roots)

Step E

Step F

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points

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.