jstring2past jstring2past

29-04-2017
Mathematics

contestada

if 3^2×-1=81, what is the value of x?

Respuesta :

Tamiaharris1940 Tamiaharris1940

29-04-2017

it wrong, 3^2 =9

9 x -1= -81.

it always negative put on it.

Answer Link

ghanami ghanami

29-04-2017

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

Answer Link

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