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Alex Ar [27]
3 years ago
9

PLEASE HELP ALGEBRA 2!!!

Mathematics
1 answer:
Virty [35]3 years ago
6 0

Answer:

y=-4x^{2} +7x+6\\

Step-by-step 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

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