SOLUTION: What polynomial, when divided by {{{3y^2}}} yields {{{8y^2-4y+7}}} as a quotient?

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: What polynomial, when divided by {{{3y^2}}} yields {{{8y^2-4y+7}}} as a quotient?      Log On


   



Question 666327: What polynomial, when divided by 3y%5E2 yields 8y%5E2-4y%2B7 as a quotient?
Answer by Leaf W.(135) About Me  (Show Source):
You can put this solution on YOUR website!
The polynomial will be the product of what it is being divided by (3y%5E2) and the quotient (8y%5E2-4y%2B7). If you do not understand why, here is an example of a simpler problem that will hopefully make this idea easier:
6 / 2 = 3
The 6 is the number being divided, similar to the polynomial you are looking for in this problem. The 2 is the number the polynomial is divided by, similar to the 3y%5E2 in your problem. Finally, the 3 is the quotient, similar to the 8y%5E2-4y%2B7 in your problem.
What I just said is that the polynomial (or in our simpler example, the 6) will be the product (multiplication) of what it is being divided by (the 2) and the quotient (the 3). If we do the math, we find out that this is correct:
2 * 3 = 6
If we try other examples, this still holds true:
8 / 4 = 2; 4 * 2 = 8
15 / 3 = 5; 3 * 5 = 15
Therefore, we can find the answer to the problem by multiplying 3y%5E2 and 8y%5E2-4y%2B7.
3y%5E2%288y%5E2-4y%2B7%29
Distribute the 3y%5E2 into the 8y%5E2-4y%2B7 by multiplying it by each element:
1. %283y%5E2%29%288y%5E2%29+=+24y%5E4
2. %283y%5E2%29%28-4y%29+=+-12y%5E3
3. %283y%5E2%29%287%29+=+21y%5E2
Therefore, the solution to your problem is 24y%5E4+-+12y%5E3+%2B+21y%5E2.