Which expression is the factorization of x2 + 10x + 21? (x + 3)(x + 7) (x + 4)(x + 6) (x + 6)(x + 15) (x + 7)(x + 14)

First option.

Step-by-step explanation:

You need to remember that to factorize the given expression , you need to choose two numbers that when you add them you get "10" and when you multiply them you get "21".

These number are:

7 and 3

Because:

Therefore, you get that the factorization of the expression is the following:

You can observe that this factorization matches with the first option.

hreryryrranswer:

step-by-step explanation:

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