Question

The area of a rectangle is represented by x^2-2x-8
find an expression for the length of each side if x=5

Answer 1

hmmm

Answer 2

sounds like you need to factor x^2-2x-8 as a first step

Answer 3

area=x^2-2x-8
LW=( )( ) <--this is the factored form of the area

Answer 4

so what two numbers multiply to be -8 and add up to be -2?

Answer 5

@Ednac are you there?

Answer 6

there is nothing to factor from the initial problem @myininaya

Answer 7

yes you need to factor x^2-2x-8

Answer 8

to find the length and the width of the rectangle

Answer 9

it is as factored as it gets

Answer 10

-4(2)=-8
-4+2=-2
it can be factored

Answer 11

so given that the factored form of x^2-2x-8 is ?

Answer 12

is there a term that can be taken out fropm all of the terms other than one?

Answer 13

Where are you going with the fact that it is factorable

Answer 14

to find the length and width of the rectangle with area=x^2-2x-8

Answer 15

Area of rectangle=Length * Wdith
x^2-2x-8 =( )* ( )

Answer 16

now I basically told you the factored form

Answer 17

since I said -4(2)=-8 and -4+2=-2

Answer 18

so x^2-2x-8=(x-4)(x+2)

Answer 19

now you have the length and the width

Answer 20

your question wants to know the length and the width when x=5

Answer 21

awesome job at explaining @myininaya

Answer 22

I tried (or try)