Question

va rog ajutor dau coroana​

Answer 1

a)

$[ - 9 + ( - 3) \times ( - 4)] \times [2 - ( - 6) \div ( + 3)] - ( + 12) =$

$[ - 9 + ( -12)] \times [2 - ( - 2)] - 12 =$

$( - 9 - 12) \times (2 + 2) - 12 =$

$( - 21) \times 4 - 12 =$

$- 84 - 12 =$

$= 96$

b)

${ [ {( - 19)}^{3} ] }^{4} \div ( - 1 9){}^{11} + {2}^{17} \div { [ {( -2)}^{2} ] }^{8} =$

${ {( - 19)}^{12} }^{} \div ( - 1 9){}^{11} + {2}^{17} \div { {( -2)}^{16} }^{} =$

${( - 19)}^{1} + ( - 2) {}^{1} = - 19 - 2 = - 21$