How solve this question with explanation ??

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Answer:
Step-by-step explanation:
First of all the quality of picture is bad!!! Impossible to see anything...
I know what this task all about, but still need to operate clear picture...
So, g(x) = 5x² + 3 and h(x) = 7x - 4 are functions R ---> R
a). (I assume there is sign of multiplication between g and h)
g*h = (5x² + 3)(7x - 4) = 35x³ - 20x² + 21x - 12
b). Is g (????) ? Sorry, but I cannot recognize the word.
No, g(x) is not one-to-one function. Each "x" in the domain has only one "y" image in the range, but "y" in the range has two "x" in the domain.
c). Function is not exist in whole set of real numbers.
g = 5x² + 3 ⇒ x² = ⇒ x =
⇒
(x) =
( x ≥ 3 and
≥ 0 )
Domain of is [ 3 , ∞ ) ;
Range of is [0 , ∞ ) .
d). h(x) = 7x - 4 ⇒ =
is R ---> R function.