A quadratic equation is written in the form
Looking at the second, third, and fourth options, we see that the highest powers are greater than two, which automatically disqualifies them from being quadratics (since the highest power in a quadratic is 2).
This makes the first option the correct choice since the expansion of the equation gives
Answer:
You need to use A, B, and C.
Step-by-step explanation:
Let's treat the units as variables. I'll illustrate why in a moment.
Now, as you can see, we have a giant mess of units to deal with. This is where we can treat the units like separate variables and use a bit of algebra to make our lives easier:
So, backtracking through that entire mess, we had to use .
These correspond to the options of A, C, and B accordingly.
So you need to use A, B, and C.