Question

Simplifique as expressoes algebricas. a) 5(2a + 2)
b) -8n -(n +9) + 21
c) 3x + (x-2) - (6x - 9)
d) (x-y + 4)-(2x + 6y +10)

Answer 1

a)
= 5.(2a + 2)

= 10a + 10

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b)
= - 8n - (n + 9) + 21
= - 8n - n - 9 + 21
= - 9n + 12

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c)
= 3x + (x - 2) - (6x - 9)
= 3x + x - 2 - 6x + 9
= 4x - 2 - 6x + 9
= 4x - 6x - 2 + 9

= - 2x + 7

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d)
= (x - y + 4) - (2x + 6y + 10)
= x - y + 4 - 2x - 6y - 10
= x - 2x -y - 6y + 4 - 10
= - x - 7y - 6

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