Question

URGENTE
Simplifique as expressões algébricas

a) 10ab - [3ab - (ab + 2ab - 5ab) - 8ab]
b) 2xy + [-5xy + 2xy - (xy + 4xy - 2 xy) - 8xy]
c) 1,2ax - (-0,6ax + 3,4ax - 2,9ax) - (7,3ax - 0,8ax) 

Sabendo que p = 6, a = 3, b = 4 e c = 5, calcule o valor de   √p(p-a) (p-b) (p-c) 

Answer 1

a)
 = 10ab - [3ab - (ab + 2ab - 5ab) - 8ab]

= 10ab - [ 3ab - (3ab - 5ab) - 8ab]

= 10ab - [ 3ab - ( - 2ab) - 8ab]

= 10ab - [ 3ab + 2ab - 8ab]

= 10ab - [ 5ab - 8ab]

= 10ab - [ - 3ab]

= 10ab + 3ab

= 13ab

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b)
= 2xy + [- 5xy + 2xy - (xy + 4xy - 2 xy) - 8xy]

= 2xy + [ - 3xy - (5xy - 2xy) - 8xy]

= 2xy + [ - 3xy - ( 3xy) - 8xy]

= 2xy + [ - 3xy - 3xy - 8xy]

= 2xy + [ - 14xy]

= 2xy - 14xy

= - 12xy

¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨

c)
= 1,2ax - (-0,6ax + 3,4ax - 2,9ax) - (7,3ax - 0,8ax) 

= 1,2ax - (-0,6ax - 2,9ax + 3,4ax) - (6,5ax)

= 1,2ax - ( - 3,5ax + 3,4ax) - 6,5 ax

= 1,2ax - ( - 0,1ax) - 6,5 ax

= 1,2ax + 0,1ax - 6,5 ax

= 1,3ax - 6,5 ax

=  - 5,2 ax

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Sabendo que p = 6, a = 3, b = 4 e c = 5, calcule o valor de:
      ________________ 
=  √p(p-a) (p-b) (p-c)
 
     ___________________
= √6.(6 - 3).(6 - 4).(6 - 5)
     ___________ 
= √6.3.2.1

= √6.6

= √36

= 6