Question

помогите срочно очень надооооооо​

Answer 1

${3}^{12} \times {3}^{ - 9} = {3}^{12 - 9} = {3}^{3} = 27$

${x}^{11} \div {x}^{4} = {x}^{11 - 4} = {x}^{11 - 4} = {x}^{7}$

${( {a}^{7} )}^{3} = {a}^{7 \times 3} = {a}^{21}$

${(xy)}^{5} = {x}^{5} \times {y}^{5}$

${( \frac{a}{5} )}^{4} = \frac{ {a}^{4} }{ {5}^{4} } = \frac{ {a}^{4} }{625}$