algebra questions help

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1.)  Suppose a parabola has vertex (–4, 7) and also passes through the point (–3, 8). Write the equation of the parabola in vertex form. 

2.)  What is the vertex form of the equation? y = x2 – 6x + 8 

4.)  What is the equation, in standard form, of a parabola that contains the following points? (–2, –20), (0, –4), (4, –20) 

5.)  What is the expression in factored form?  x2 + 13x + 42 

6.)  What is the expression in factored form?  6x2 + 4x 

7.)  What is the expression in factored form?  4x2 + 11x + 6 

8.)  What is the expression in factored form?  9x2 – 4 

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