40 pontos por 4 questões me ajudemm pfvrr
b) 3(+-2) = 4(+13)
c) 2(+-1)-(+-1) = 0
d) 5(+1)-3(++2) = 0
e) 13+4(2+-1) = 5(++2)
Parece enorme mee desculpem
b) 3(+-2) = 4(+13)
c) 2(+-1)-(+-1) = 0
d) 5(+1)-3(++2) = 0
e) 13+4(2+-1) = 5(++2)
Parece enorme mee desculpem
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Explicação passo-a-passo:
b)3(+-2)=4(+13)
+6=+52
×=52-6
×=46
c)2(+-1)-(+-1)=0
2-2=0
×=0-2+2
×=-2+2
×=0
d)5(+1)-3(++2)=0
5-6=0
-6=0-5
-6=-5
×=-5+6
×=1
e)13+4(2+-1)=5(++2)
13+8-1=10
21-1=10
20=10
×=10-20
×=-10