SOLUTION: Complete the general form equation of the parabola that passes through (2,−21)with vertex at (−1,−3) Enter the quadratic expression in general form, ax^2+b

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Question 1126203: Complete the general form equation of the parabola that passes through
(2,−21)with vertex at (−1,−3)
Enter the quadratic expression in general form,
ax^2+bx+c.

Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39618)   (Show Source): You can put this solution on YOUR website!




-



-
, which you can 'simplify' .



, here in ax^2+bx+c form.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Complete the general form equation of the parabola that passes through
(2,−21)with vertex at (−1,−3)
Enter the quadratic expression in general form,
ax^2+bx+c.
Vertex from: 

 ------- Substituting (2, - 21) for (x, y) and (- 1, - 3) for (h, k) 

- 21 = 9a - 3

- 21 + 3 = 9a

- 18 = 9a



 ------- Substituting - 2 for a, and (- 1, - 3) for (h, k) 



 

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