Question

ASAP PLZ HELP ASAP
An expression is shown below:
f(x) = -16x2 + 60x + 16

Part A: What are the x-intercepts of the graph of the f(x)? Show your work.

Part B: Is the vertex of the graph of f(x) going to be a maximum or minimum? What are the coordinates of the vertex? Justify your answers and show your work.

Part C: What are the steps you would use to graph f(x)? Justify that you can use the answers obtained in Part A and Part B to draw the graph.

Answer 1

if
y = f(x) = 0
then, it will cross the X axis there at points (x , 0)

Answer 2

ok

Answer 3

y = 0 = -16x^2 + 60x + 16

Answer 4

maybe divide everything by 4 first

Answer 5

ok

Answer 6

\[0 = 4x^2-15x+4\]

i divided both sides by -4, can you factor that now?

Answer 7

maybe

Answer 8

what you think... ?

Answer 9

idk im bad with math :(

Answer 10

4x^2−11?

Answer 11

You can expand that to check if it is right...

0 =(x - 4)* (4x +1)

Answer 12

So if either of those two quantities is Zero, then the equation is true...

x - 4 = 0
or
4x+1 = 0

solve for the two x intercepts