150k views
5 votes
Graph this function: f(x) = x2 - 4x - 5

Step 1: Identify a and b.
a=
b =

Graph this function: f(x) = x2 - 4x - 5 Step 1: Identify a and b. a= b =-example-1
User Slashroot
by
8.8k points

2 Answers

1 vote

Answer:

Answer: a= 1 b= -4

Step 2 find the vertex formula x = -b/2aX= 4/2(1)X= 2

Find the y-coordinate of the vertex: f(x)= 2^2-4(2)-53F(2)= -9

Step 3: plot the vertex(2,-9)

Step 4: factor the function to find the x- intercepts

X-intercepts are: (5,0) and (-1,0)

Step 5: plot x-interceptsStep

6: find y-interceptF(0)= -5

Step 7: plot -5

Done :)

Explanation:

User Dbaston
by
8.4k points
6 votes

Answer:

a=1

b=-4

The graph is a parabola with vertex in (2,-9), y-intercept (0,-5) and x-intercepts (+5,0) and (-1, 0)

Explanation:


xv = ( - b)/(2a)


yv = f(xv)

y-intercept: P(0, c)

x-intercepts: find x1 and x2 with the quadratic formula, then P1(x1, 0) and P2(x2, 0)

User Amrita Sawant
by
7.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.