The graph of y=ax^2+bx+c passes through points (0,5), (1,10), and (2,19). Find a+b+c.
I tried what EP said, and plugged in 0,5, where 5 is y, and 0 is x. I got c = 5.
Then I plugged in 1,10 y = 10, x = 1.
Plugged in 2,19 y = 19 x = 2.
Then i substituted and I got a wonky answer...
