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If 9^x+2= 720+9^x find the value of (4x)^1/2 (solve it)

Answer» HELLO MATE!

{9}^{x + 2}  = 720 +  {9}^{x}  \\  {9}^{x}  \times  {9}^{2}  = 720 +  {9}^{x}  \\  {9}^{x}  \times  {9}^{2}  -  {9}^{x}  = 720 \\  {9}^{x} (81 - 1) = 720 \\  {9}^{x}  =  \frac{720}{80}  \\  {9}^{x}  = 9 \\ x = 1 \\  \\  {(4x)}^{ \frac{1}{2} }  =  {4}^{ \frac{1}{2} }  = 2


HOPE it helps☺!


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