Answer:
The correct answer is B.
Step-by-step explanation:
In order to find this, calculate out the discriminant for each of the following equations. If the discriminant is a perfect square, then it can be factored.
Discriminant = b^2 - 4ac
The only of the equations that does not yield a perfect square is B. The work for it is done below for you.
Discriminant = b^2 - 4ac
Discriminant = 7^2 - 4(2)(-5)
Discriminant = 49 + 40
Discriminant = 89
Since 89 is not a perfect square, we cannot factor this.
Answer:
y = 1/4x^2 - 4.
Step-by-step explanation:
Vertex for is:
y = a(x - 0)^2 - 4 where a is a constant.
The graph passes through ( -8, 12) so substituting:
12 = a(-8)^2 - 4
12 = 64a - 4
64a = 16
a = 16/64 = 1/4.
So the equation is y = 1/4x^2 - 4.
Answer:
C. (1,2)
Step-by-step explanation:
They intersect at 1,2.
12x3=36 That is the equation
