What is the domain of (f*g) (x)=45x^2+19x-42?

Can someone please help me? I can not, for the life of me, get this. I need it explained to me in a way I won't forget.

Question

What is the domain of (f*g) (x)=45x^2+19x-42? 

Can someone please help me? I can not, for the life of me, get this. I need it explained to me in a way I won't forget.

haseeb96 · Answer

What do u think, what would be the domain for this ?

anonymous · Answer

I think it's completely wrong...but I think it is...(.77, infinity) , and (1.2, infinity)

welshfella · Answer

I assume you know what a domain is?

anonymous · Answer

But like I said...I'm pretty sure it is completely wrong...

anonymous · Answer

Yes...domain is the X value and it goes from left to right

welshfella · Answer

right This function is a parabola which opens upwards
and looks a bit like
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