An expression is shown below:

f(x) = -16x^2 + 60x + 16

Part A: What are the x-intercepts of the graph of the f(x)? Show your work. (2 points)

Question

An expression is shown below:

f(x) = -16x^2 + 60x + 16

Part A: What are the x-intercepts of the graph of the f(x)? Show your work. (2 points)

lifeisadangerousgame · Answer

x - intercepts are where y equals zero. So how do you think we should set up the equation?

josedavid · Answer

ummm is hard

lifeisadangerousgame · Answer

f(x) is y so let's set y to zero. So now the equation is: $$0 = -16x^{2} + 60x +16$$

lifeisadangerousgame · Answer

What do you think might be best to do next?

josedavid · Answer

ummmm i need to do the x

lifeisadangerousgame · Answer

What do you mean?

lifeisadangerousgame · Answer

You are trying to find x, what do you think we should do with the equation we have right now? Do you know the Quadratic Formula?

josedavid · Answer

nope that is what i need help

lifeisadangerousgame · Answer

Okay, this is the quadratic formula:

$$-b \pm \frac{ \sqrt{b^2 - 4ac} }{ 2a }$$

lifeisadangerousgame · Answer

So do you know what your a, b, and c variables are?

josedavid · Answer

2
is for the b

josedavid · Answer

@LifeIsADangerousGame

josedavid · Answer

u there

lifeisadangerousgame · Answer

Sorry yes I am here. Take a look at this:
Ax^2 + Bx + C

Now can you figure out what A, B, and C are?

lifeisadangerousgame · Answer

Hi there, I'm sorry that I disappeared yesterday. My internet went out and I couldn't reconnect, I'm very sorry. @josedavid

josedavid · Answer

is cool