## Mimi_x3 4 years ago A poster consists of a photograph bordered by a 5cm margin. The area of the poster is to be 400cm^2. (a) Show that the area of the photograph is given by the equation A=500-10x-4000/x (b) Find the maximum area possible for the photograph. (There's also a diagram that i will draw)

1. Mimi_x3

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2. anhhuyalex

so what is x again?

3. Mimi_x3

What do you mean ? x again ?

4. Hashir

plz make a clearer diagram !!!!!

5. Mimi_x3

gr8 , okay xD

6. Hashir

me me me me me me x3 times boosted !!! virus

7. Mimi_x3

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8. Mimi_x3

is it good now ? Damn , i cant draw on this stupid mouse pad xD

9. Hashir

lana u gon from facebook !!!! :(

10. Mimi_x3

11. kushashwa23

c

12. kushashwa23

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13. AR

Is it a rectangular poster or square?

14. Mimi_x3

rectangular

15. Hashir

16. AR

Okay. 400cm^2 = (l + 10) * (b + 10) now actually the area of the picture is lb but with the additional borders on each end it becomes as above. 400 = lb + 10b + 10l + 100 lb = 300 - 10b -10l And I think I am stuck O.o

17. Mimi_x3

awww :(

18. Mimi_x3

Never mind Hashir I will work it out myself (:

19. Hashir

20. Mimi_x3

Okay ty

21. Hashir

here it is

22. Hashir

23. Hashir

i hope u can differentiate that mimi nad then put equal to zero and find x !!

24. Mimi_x3

tyvm hashir (:

25. Hashir

np you are welcome !!!!!

26. Mimi_x3

yup i can differentiate xD

27. Hashir

ok i gtg !!! bye

28. nilankshi

good harhir

29. Mimi_x3

ok byee~

30. Hashir

thnkoo!!!!