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If 3^2×-1=81, what is the value of x?

If 3^2×-1=81, what is the value of x?
asked 16.6k views
1 vote
If 3^2×-1=81, what is the value of x?

asked
User Datajam
by
7.6k points

2 Answers

2 votes
hello :
3^(2×-1)=81
3^(2×-1) = 3^4
2x-1 =4
2x=5
x=5/2

answered
User Arthur Reutenauer
by
8.0k points
1 vote
it wrong, 3^2 =9

9 x -1= -81.

it always negative put on it.

answered
User He Hui
by
7.8k points
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