Question

81*7:3*5*2(steluta reprezinta la puterea)

Answer 1

81⁷=(3⁴)⁷=3⁴ˣ⁷=3²⁸
$3 ^{5 ^{2} } =3 ^{25}$
3²⁸:3²⁵=3²⁸⁻²⁵=3³=27

Answer 2

$81^{7}:(3^{5})^{2}=$
$81= 3^{4} \\ \\ 81^{7}=(3^{4})^{7}=3^{28} \\ \\ (3^{5})^{2} = 3^{25}\\ \\3^{28} :3^{25} =3^{28-25} =3^{3}=27$

$81^{7}:(3^{5})^{2}=27$