Explicație pas cu pas:
a)
[tex]( - 16)^{25} = - {16}^{25} = - ({2}^{4})^{25} = - {2}^{100} [/tex]
[tex]( - 32)^{20} = {32}^{20} = ({2}^{5})^{20} = {2}^{100} [/tex]
[tex] = > opuse[/tex]
b)
[tex] \frac{2x + 5 + ( - 16)^{25} + ( - 32) ^{20}}{21} = \frac{5}{3} \\ \frac{2x + 5 - 2^{100} + 2^{100}}{21} = \frac{5}{3} \\ \frac{2x + 5}{21} = \frac{5}{3} \\ 3(2x + 5) = 21 \times 5 | (\div 3)| \\ 2x + 5 = 7 \times 5 \\ 2x = 35 - 5 \\ 2x = 30 = > x = 15 [/tex]
