Question

Select the correct answer.

What is the product of (x - 3) and (x + 7)?
A.
x2 + 10x - 21
B.x2 - 10x-21
oc. x² - 4x-21
D. x2 + 4x - 21
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Answer 1

should be D.

Explanation:

F.O.I.L.

x*x=x^2

x*7=7x

-3*x=-3x

-3*7=21

x^2+7x-3x-21

x^2+4x-21

Answer 2

c

Explanation:

use foil so u multiply x and then x and 7 then -3 and x and 7 finally simplify