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x-y
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All
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Ramesh Kumar 8 years, 1 month ago

160
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Naveen Sharma 8 years, 2 months ago

{tex}\sqrt {x+15}+\sqrt x = 15 {/tex}

{tex}=> \sqrt {x+15} = 15- \sqrt x {/tex}

squaring both sides, we get 

{tex}=> x+15 = 225 + x + 30\sqrt x{/tex}

{tex}=> 30\sqrt x = 210{/tex}

{tex}=> \sqrt x = 7{/tex}

squaring both sides, we get

{tex}=> x = 49 {/tex}

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Khan Israil 8 years, 2 months ago

Because only sine and cosine will positive on 2nd quadrant

Anshul Gupta 8 years, 2 months ago

Because all are positive in 2nd quadrant
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Bantu Mahesh 8 years, 2 months ago

not homogeneous

there is a term independent of  function y

 

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