Question

Giúp mik bài 2 vs ạ

Answer 1

a)

\(=\dfrac{1}{2}-\dfrac{7}{8}=-\dfrac{3}{8}\)

b)

\(=\dfrac{1}{8}-\dfrac{1}{2}+\dfrac{3}{4}=\dfrac{1}{8}-\dfrac{4}{8}+\dfrac{6}{8}=\dfrac{3}{8}\)

c)

\(=\dfrac{5^{12}+5^4}{5^2+5^{10}}=\dfrac{5^4\left(5^8+1\right)}{5^2\left(1+5^8\right)}=5^2=25\)