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|dw:1442710030323:dw|

|dw:1442710064925:dw|

can you tell me what this length is?
|dw:1442710140915:dw|

15?

no the 7 is the vertical dimension
I'm asking for the total horizontal dimension

hint:
|dw:1442710233263:dw|

30?

idk how you're getting that

do you see the stuff I circled?

yes

add them up to get ???

2x or x^2

x + 8 + x = ???

think of it like this `apple + apple = 2 apples`
so `x + x = 2x`
right?

yeah x8x?

so if x+x = 2x, then x+x+8 turns into what?

2x+8

good

|dw:1442710945434:dw|

so hopefully you see how that total length marked in the drawing is 2x+8 feet?

i finally do :D

ok great

what is this marked length here?
|dw:1442711082155:dw|

2x+7?

good

|dw:1442711337192:dw|

now if the length was 2x+8 and the width was 2x+7, then what is the area of the rectangle?

4x+15?

you have to multiply (2x+8) with (2x+7)
FOIL it out

could you show me ?

have you learned the box method? that's actually better than FOIL

4x^2+30x+56?

good, you used the box method to get that? or some other method?

box method

ok great

now get everything to one side

how

subtract 58 from both sides

|dw:1442712284053:dw|

|dw:1442712322065:dw|

|dw:1442712342649:dw|

4x^2+30x-2

correct

0 be left on the other side (since 58-58 = 0)
so we have this answer `4x^2 + 30x - 2 = 0`

ok wow

tahnks alot for everything :)

no problem