Description
if the point (1,-2) lies on the graph it satisfies the equation y=ax^2+bx+c
substitute _____ for x and _____ for y to get -2=a+b+c
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Explanation & Answer
y = ax^2 + bx + c
Putting x = 1 and y = -2, then
- 2 = a(1)^2 + b(1) + c
- 2 = a(1) + b + c
- 2 = a + b + c
Hence .
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