Question

The area of a rectangle is x2 - 2x - 15 and the length of the rectangle is x + 3. Find the width of the rectangle.

A. x – 5

B. x2 + 15

C. x + 5

D. (x – 2)(x + 3)

Answer 1

i put b?

Answer 2

Length * Width = Area

(x+3) * (x^2 + 15) = x^2 - 2x - 15

is that last equation true for all values of x?

Answer 3

Can't be. The area is Second Degree.

\(x^{2} - 2x - 15 = SOMETHING*(x+3)\)

I'm guessing that left hand side can be factored.

Answer 4

you can factor the equation and you would find the width of the rectangle

Answer 5

and b its wrong

Answer 6

i figured ...

Answer 7

good job :)

Answer 8

since i got it wrong... =*(

Answer 9

c?

Answer 10

what do you get when you expand out (x+3)(x+5)

Answer 11

Its wrong

Answer 12

x2 - 2x - 15=(x+3)(x_ _)

on the blank you have to find the (+ or -) and a number

Answer 13

@hinarauf80

Answer 14

ummm -?

Answer 15

a or d

Answer 16

its a

Answer 17

ok man thanks

Answer 18

YW!