Thirteen less than the total of a number and eight. write as an expression
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Answer:
The turning point of a parabola is the vertex
Vertex form of a quadratic equation:
(where (h, k) is the vertex and a is the coefficient of the variable x²)
Given:
- vertex = (-1, 3)
Therefore, a = 1
Substituting a = 1 and the given vertex into the equation:
Therefore, a = 2 and b = 4