Answer:
Option 1 is correct
Explanation:
We have been given with the function 4 -7i
To find the absolute value means to find the modulus of the function.
And modulus of the function is
Here we have a=4 and b= -7 so substituting the values in the formula we will get
Hence, Option 1 is correct
Option 2 is incorrect because we do not consider "i" in finding absolute value or modulus
Option 3 is incorrect because it should be -7 not 7
Option 4 is incorrect because it should not be whole square.
Therefore Option 1 is correct.
Answer:
Step-by-step explanation:
Vertex form of a quadratic equation;
Vertex of the parabolas (h, k)
The vertex of the parabola is either the minimum or maximum of the parabola. The axis of symmetry goes through the x-coordinate of the vertex, hence h = -3. The minimum of the parabola is the y-coordinate of the vertex, so k= 7. Now substitute it into the formula;
Now substitute in the given point; ( -1, 9) and solve for a;
Hence the equation in vertex form is;
In standard form it is;