a) ( − 3 ) 4 = ( − 3 ) 2 ⋅ ( − 3 ) 2 = 9 ⋅ 9 = 81 {\displaystyle (-3)^{4}=(-3)^{2}\cdot (-3)^{2}=9\cdot 9=81\,}
b) − 3 4 = − ( 3 4 ) = − 81 {\displaystyle -3^{4}=-(3^{4})=-81\,}
