What is the product of (x-3) and (x + 7) ?

O A. x² + 108-21

B. x2 - 108-21

c. x² - 4x-21

D. x² + 4x - 21

4X-21

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The answer is D: x (Squared) + 4x - 21.

Step-by-step explanation:

(X-3) (x+7)

First you multiply the first x by x, to get x squared. Then you multiply the first x by 7 to get 7x.

Next you multiply the - 3 by the second x, to get - 3x. Then you multiply the - 3 by the 7 to get - 21.

Written in order it would look like:

X (squared) + 7x - 3x - 21

You can combine the 7x and the - 3x because they are like terms. This would leave you with:

x (squared) + 4x - 21