stupidinmath
"if the area of a square is 4x^212xy+9y^2 , what is its perimeter?"
*what will i do first with the area????????



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ParthKohli
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Your area is already given, and you'd find the square root to get the measure of a side.

hartnn
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can u factor the equation : 4x^212xy+9y^2

ParthKohli
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Do you know how to complete the square?

stupidinmath
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4x^212xy+9y^2 factored = (2x3y)(2x3y)

estudier
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dw:1348230466541:dw

hartnn
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thats right :)
so its
(2x3y)^2
right ?

stupidinmath
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yup/

hartnn
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AREA =side^2
so what will be the side if area is (2x3y)^2

sriramkumar
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area=(2x3y)^2= s^2
s=2x3y
and perimeter is 4s= 4(2x3y) i guess....

hartnn
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i wanted @stupidinmath to try that^

stupidinmath
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(2x3y)+(2x3y)+(2x3y)+(2x3y)
=8x^412y^4?
or . . .
4(2x3y)
=8x12y?
.______________________________.

hartnn
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since u are adding and not multiplying all sides,
it will be 8x12y

stupidinmath
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THANKS:)

hartnn
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welcome :)