Question

1.
3ˆ50=9^3x-5
x=?
2.a^2=2016ˆ2 -2016-1015
Si ce inseama diviser propriu?

Answer 1

1.
${3}^{50} = ({3}^{2})^{3x - 5} = > 3x - 5 = 25$
$= > x = 10$
2.
$2016 \times 2016 - 2016 - 2015 =$
$2016 \times 2015 - 2015 = 2015 \times 2015$
$2015 \times 2015 = {2015}^{2}$