Answer:
(x + 7)(x^2 + 3)
Step-by-step explanation:
The two constant terms in the binomials must have a positive product, so both will have the same sign. This eliminates the last two choices.
The coefficient of x^2 is +7, which eliminates the first choice.
The factorization is shown by the second choice:
(x + 7)(x^2 + 3)
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A caret (^) is used to signify an exponent.
