Question

efetue as opções: a)7a^2+2a^2-6a^2 b)20ab-17ab-5ab c)2xy+5xy-3xy d)x^4.x^6 e)(-32xyz)÷8xy​

Answer 1

a) 7a² + 2a² - 6a² = 3a²

b) 20ab - 17ab - 5ab = - 2ab

c) 2xy + 5xy - 3xy = 4xy

d) x⁴ . x⁶ = x¹⁰

e) (- 32xyz) ÷ 8xy = - 4z

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Espero ter ajudado

Answer 2

Oie, tudo bom?

a)

$= 7a {}^{2} + 2a {}^{2} - 6a {}^{2} \\ = (7 + 2 - 6)a {}^{2} \\ \boxed{ = 3a {}^{2} }$

b)

$= 20ab - 17ab - 5ab \\ = (20 - 17 - 5)ab \\ \boxed{ = - 2ab}$

c)

$= 2xy + 5xy - 3xy \\ = (2 + 5 - 3)xy \\ \boxed{ = 4xy}$

d)

$= x {}^{4} \: . \: x {}^{6} \\ = x {}^{4 + 6} \\ \boxed{ = x {}^{10} }$

e)

$= \frac{ - 32xyz}{8xy} \\ = \frac{ - 32yz}{8y} \\ = \frac{ - 32z}{8} \\ \boxed{ = - 4z}$

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