1.

Sopve plese .........................

Answer»
=  \sqrt{x + 25}  = 1 +  \sqrt{x}  \\  \\  =  { (\sqrt{x + 25})}^{2}  =  {( 1 +  \sqrt{x})}^{2}  \\  \\  = x + 25 = 1 + x + 2 \sqrt{x} \\  \\  = 2 \sqrt{x}  = 24 \\  \\  =  \sqrt{x} = 12 \\  \\  = x = 144


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