Answer:
![y=-4x^{2} +7x+6\\](https://tex.z-dn.net/?f=y%3D-4x%5E%7B2%7D%20%2B7x%2B6%5C%5C)
Step-by-step explanation:
![y=ax^{2} +bx+c\\](https://tex.z-dn.net/?f=y%3Dax%5E%7B2%7D%20%2Bbx%2Bc%5C%5C)
Points are (1,9), (2,4), and (4,-30).
![\\9=a+b+c\\4=4a+2b+c\\-30=16a+4b+c\\](https://tex.z-dn.net/?f=%5C%5C9%3Da%2Bb%2Bc%5C%5C4%3D4a%2B2b%2Bc%5C%5C-30%3D16a%2B4b%2Bc%5C%5C)
Subtract the first from the second.
-5 = 3a+b
Subtract 4 times the second from the third.
-34=12a+2b
-14=-2b
b=7
a=-4
c=6
Answer: i cant read that m8 take a better picture
Step-by-step explanation: