miacorners miacorners

23-04-2017
Mathematics

contestada

7^x^2=9^x
how do I solve this using logs

Respuesta :

Aishani Aishani

23-04-2017

Apply lg on both sides.
lg7^x^2 = lg9^x
Bring the power forward.
x^2lg7 = xlg9
x^2/x = lg9/lg7
x = lg9/lg7 = 1.13

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