Question

PLEASE HELP ALGEBRA 2!!!

Answer 1

`y=-4x^(2) +7x+6\\`

Explanation:

`y=ax^(2) +bx+c\\`

Points are (1,9), (2,4), and (4,-30).

`\\9=a+b+c\\4=4a+2b+c\\-30=16a+4b+c\\`

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