(-3)(7) = -21.
y^8 and c^3 have different bases (y and c) and thus cannot be merged.
So we end up with -21c^3y^8.
Answer:

Step-by-step explanation:
We need to first simplify the expression using rationalization(i.e. if a square root term exists in the denominator, then multiply and divide the whole expression by the denominator(but the change the sign of its middle term))
here, we need to find:

first we'll rationalize our expression:





this is our simplified expression, now we can apply our limits:




the limit does exists and it is 2.
The volume of a large aquarium is 210 ft. Is
You order 4 pizzas for a party. At the end of the party only half of a pizza is left. How much pizza did the guests eat? That's one problem can't think of a 2nd one.