Question

Alguém por favor pode me explicar esses exercícios ?
2²×2³=
(-4)²=
(2/3)²=​

Answer 1

Explicação passo-a-passo:

2²×2³=2^(2+3)= 2^5 = 32

(-4)²=(-4).(-4)=+16

(2/3)²=2²/3²=4/9

Answer 2

Propriedades das Potências1)$\boxed{\boxed{\mathsf{{a}^{m}.{a}^{n}={a}^{m+n}}}}$ 2)$\boxed{\boxed{\mathsf{{a}^{m}\div{a}^{n}={a}^{m-n}}}}$ 3)$\boxed{\boxed{\mathsf{{({a}^{m})}^{n}={a}^{m.n}}}}$ 4)$\boxed{\boxed{\mathsf{{(a.b)}^{m}={a}^{m}.{b}^{m}}}}$ 5)$\boxed{\boxed{\mathsf{{(\dfrac{a}{b})}^{m}=\dfrac{{a}^{m}}{{a}^{n}}}}}$

Vamos resolver a questão com base nestas propriedades

$\boxed{\boxed{\mathsf{{2}^{2}.{2}^{3}={2}^{2+3}={2}^{5}=32}}}$

$\boxed{\boxed{\mathsf{{(-4)}^{2}=16}}}$

$\boxed{\boxed{\mathsf{{(\dfrac{2}{3})}^{2}=\dfrac{{2}^{2}}{{3}^{2}}=\dfrac{4}{9}}}}$