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AnastasiaJauregui
07.08.2019 •
Mathematics
What is the equation of the quadratic function with a vertex at (2, 25) and an x-intercept at (7,0)?
f(x) = (x - 2)(x - 7)
f(x) = (x + 2)(x + 7)
f(x) = (x - 3)(x + 7)
of(x) = (x + 3)(x - 7)
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Ответ:
which is none of the choices provided.
Are you sure the question is right or even the choices?
You can even write it as:
Step-by-step explanation:
The vertex form of a quadratic is
.
This is called vertex form because it gives you the vertex is
.
We are given that
which makes our equation:
We can find the value of
by plugging in the x-intercept (7,0) for
into:
Subtract 25 on both sides:
Divide both sides by 25:
So the equation for the quadratic is:
Let's put this into factored form since all the choices are in factored form.
This will require us to multiply the (x-2)(x-2) out:
Factor out -1:
WE need to find two numbers that multiply to be -21 and add to be -4:
Ответ:
The answer is A
Step-by-step explanation:
2 less than three-fifths a number means that there is a number multiplied by 3/5 and you subtract two from it. 3/5n-2.
Less than or equal to is the one where the mouth is facing the right and there is a line under it
And then you have 41.