Question

resolva as expressões.
a) 8+(-4).(+5)-10
b)(-3)²+(-2).(-5)-20

Answer 1

a) 8+(-4).(+5)-10
8+(-20)-10
8-20-10= 8-30= -22

b) (-3)^2+(-2).(-5)-20
9+(+10)-20
9+10-20
19-20= -1