Question

Reduza os termos semelhantes
a) 2x³ + 3a - 5x -x ³ + 2a =
b) 5mn² + 2mn - 3mn² + 5m - 3mn =
c) 5a² + 2ab + 3a² - 3b =
d) 3ab + 2ab - 3a²b - 5ab² + 2ab =

Answer 1

a)
2x³-3a+5x-x³+2a
x³-a+5x

b)
5mn²+2mn-3mn²+5m-3mn
2mn²-mn+5m
m(2n²-n+5)

c)
5a²+2ab+3a²-3b
8a²+2ab-3b

d)
3ab+2ab-3a²b-5ab²+2ab
7ab-3a²b-5ab²
ab(7-3a-5b)

Answer 2

a)

2x³ + 3a - 5x - x³ + 2a
2x³ - x² + 3a + 2a - 5x
x³ + 5a - 5x

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b) 

5mn² + 2mn - 3mn² + 5m - 3mn
5mn² - 3mn² + 3mn - 3mn + 5m
2mn² - m  + 5m

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c)

5a² - 2ab + 3a² - 3b
5a² + 3a² - 2ab - 3b
8a² + 2ab - 3b

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d)

3ab + 2ab - 3a²b - 5ab² + 2ab
-3a²b - 5ab² + 3ab + 2ab + 2ab
-3a²b - 5ab² + 7ab