Question

3.simplefique as expressões abaixo
b)3n+7n-2n+×+8×
c) 2r-5n+9n-3r+n​

Answer 1

Resposta:

A)

F = 3(n + 5) - 5(n + 2) + 7

F = 3n + 15 - 5n - 10 + 7

F = 3n - 5n + 15 - 10 + 7

F = - 2n + 15 - 3

F = - 2n + 12

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b)

F = 3(n elevado a 2 - 5n + 1) -2(n elevado a 2 + n + 1)

F = 3.(n² - 5n + 1) - 2.(n² + n + 1)

F = 3n² - 15n + 3 - 2n² - 2n - 2

F = 3n² - 2n² - 15n - 2n + 3 - 2

F = n² - 17n + 1

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c)

G = 2(x elevado a 2 + 2x + 5) - 4(x elevado a 2 - 4)

G = 2.(x² + 2x + 5) - 4.(x² - 4)

G = 2x² + 4x + 10 - 4x² + 16

G = 2x² - 4x² + 4x + 10 + 16

G = - 2x² + 4x + 26

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d)

M = 3.(x - 5) + 3.(2x + 4) - (x - 8)

M = 3x - 15 + 6x + 12 - x + 8

M = 3x + 6x - x - 15 + 12 + 8

M = 9x - x - 15 + 20

M = 8x + 5