Question

Which of the following represents the area of a rectangle whose length is x - 7 and whose width is x + 12?

Answer 1

\[x^2+5x-84\]
\[x^2-84\]
\[x^2-5x-84\]
\[x^2-84x+5\]

Answer 2

If a rectangle has length x and width y, what is the area?

Answer 3

(x-7)*(x+12)?

Answer 4

Formula:

A=l*w

Answer 5

Yes @Cubi-Cal

Answer 6

Correct. You multiply the length and width.

Answer 7

Now you need to multiply those two binomials together.
Have you heard of FOIL?

Answer 8

\(A = (x - 7)(x + 12) \)

Answer 9

Okay, so that would be x^2+5x-84

Answer 10

To multiply two polynomials together, multiply every term of the first polynomial by every term of the second polynomial. Then combine like terms.

Answer 11

Correct. Answer is A.

Answer 12

Thank you all!

Answer 13

You're welcome.