9^x+2=240+9^x,find the value x
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Answered by
22
I think your question is
=> 9^(x+2)=240+9^x
=> 9^2.9^x=240+9^x
=> 81.9^x=240+9^x
=> 80.9^x=240
=> 9^x=3=9^1/2
x=1/2
please mark as brainliest
=> 9^(x+2)=240+9^x
=> 9^2.9^x=240+9^x
=> 81.9^x=240+9^x
=> 80.9^x=240
=> 9^x=3=9^1/2
x=1/2
please mark as brainliest
Answered by
4
Answer:
0.5
Step-by-step explanation:
9^(x + 2) = 240 + 9^x
9^x.9² = 240 + 9^x
81.9^x = 240 + 9^x
81.9^x-9^x=240
9^x(81 - 1) = 240
9^x .80 = 240
9^x = 3
3^2x = 3¹
[ use, x^m = x^n then, m = n ]
2x = 1
x = 1/2
=0.5
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