Question

Efectuati:
a=$(-2)^{3}$×√49+$(-5)^4$÷$\sqrt{16+9}$

Answer 1

Calculam separat unele operatii :
(-2)³=(-2)·(-2)·(-2)=-8
√49=7
(-5)⁴=(-5)·(-5)·(-5)·(-5)=+625=625
√(16+9)=√25=5 . Reluam exercitiul :
a=-8·7+625:5
a=-56+125
a=+69
a=69