Ask your own question, for FREE!
Mathematics 71 Online
OpenStudy (anonymous):

suppose two sides of a square are given as x + 3 and 12 - x. What is its area ?

OpenStudy (anonymous):

Area=(x+3)*(12-x) =-x^2+9x36

OpenStudy (anonymous):

solve= -x^2+9x+36

OpenStudy (apoorvk):

Well, all sides of a square are equal in length, so no exception for these 2, they're equal as well :P x+3 = 12 - x Solving this, you can find out 'x', then substitute it in the equation for any side, i.e. (x+3) or (12-x) and find out the length of the sides. Squaring the side-length gives you the area of the square, as you may know. Solve and enjoy!

OpenStudy (anonymous):

\[\huge \color{green}{Area = Side^2}\]

OpenStudy (anonymous):

You have to find x from here as @apoorvk told you.. Area will be in constant form and not in variable form..

OpenStudy (apoorvk):

@burakb am not sure equating that quadratic to zero is correct. It just represents the area, and 'x' has just one possible value actually.

OpenStudy (anonymous):

If you equated the quadratic to 0 and solved it you'd be solving for the point in which the area of the square was 0.

OpenStudy (anonymous):

But this question doesn't have any restriction.So i think so just we should find that quadratic equation

OpenStudy (apoorvk):

@Malaria exactly what I meant! @burakb think about this!

OpenStudy (anonymous):

sorry i didnt see that is the square So, x+3=12-x Then 2x=9 İf only if x=(2/9) so area must be (9/2)*(9/2)=81/4

OpenStudy (anonymous):

x=(9/2)

OpenStudy (anonymous):

We can use just x=9/2 equation ...

OpenStudy (apoorvk):

@FlyinSolo_424 do you realise that factoring that quadratic led you BACK to the same factors which you had just 'distributed'?

OpenStudy (apoorvk):

Yeah we just put in x=9/2 in x+3, or 12-x (either will do since both are equal) and find out the side length. So, side length = 9/2 + 3 = 15/2 = 7.5 So, area = \((7.5)^2\) sq. units.

OpenStudy (anonymous):

My bad dude. I didnt realize. But anyways, Ive been half awake and have gotten no sleep and been doing homework alll night.. give me a little slack. Its not like I gave her a wrong answer then if I ended back to where I was.

OpenStudy (anonymous):

@apoorvk

OpenStudy (apoorvk):

Hey it's completely alright, we all make mistakes ;) (good that you tried)

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
danielfootball123: Is there any sites for custom PFP's?
9 minutes ago 6 Replies 0 Medals
Graysonunderwoods: Feelings ig
10 minutes ago 18 Replies 5 Medals
Breathless: Tada!!!! NEW START!
17 hours ago 2 Replies 2 Medals
luhbabyliyahh: I am looking for a theater script to write can someone help me?
5 hours ago 12 Replies 0 Medals
MAGABACK: ART!
22 hours ago 5 Replies 0 Medals
danielfootball123: Is Donald trump a good president?
16 minutes ago 93 Replies 6 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!