Life
what is the solution set of the equation? look below.



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Life
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dw:1352795823759:dw

hartnn
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x2 =sqrt(...)
now square both sides.

Life
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where did u get x from?, those variables are y

hartnn
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oh, its y ....
y2 =sqrt(...)
now square both sides.

Life
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y2 = y(squared)12

hartnn
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(ab)^2 =a^22ab+b^2

hartnn
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so, (y2)^2= ?

Life
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y(2qaured) + 4

hartnn
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nopes, where is 2ab term ?

Life
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4y?

hartnn
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yes.

Life
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+16?

hartnn
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(y2)^2= y^24y+4
y^24y+4= y^212
solve this for y

Life
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y=4

Life
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which means that the solution set is just 4 am i right?

hartnn
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yes.

jishan
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yeah
right