Question

a) (a²+a) × (9a³-4a+4)
b) (2x⁴+2x+4x+4x) : (x²+x)
c) (4x+3x-2) + (-7x²+-5) + (5x²+2x²-x+2)

Me ajudem por favor!! É pra daqui a pouco​

Answer 1

$\large a) ~ ~9a^5+9a^4-4a^3+4a \\\\\\\large b) ~ \dfrac{2x^3 + 10}{x + 1} \\\\\\\large c) ~ 6x-5$

                               $\Large Express\tilde{o}es~ Alg\acute{e}bricas$

a)

$(a^2 +a) ~. ~(9a^3 - 4a + 4)\\\\a^2 ~. ~9a^3 - a^2 ~. ~4a + a^2 ~. ~4 + a~. ~9a^3 - a ~. ~4a + a ~. ~4\\\\9a^5-4a^3+a^2\cdot \:4+9a^4-4a^2+a\cdot \:4\\\\\ \boxed{ ~9a^5+9a^4-4a^3+4a ~}$

b)

$\large \dfrac{2x^4+2x+4x+4x}{x^2+x} \\\\\\\large \dfrac{2x^4+10x}{x^2+x} \\\\\\\large \dfrac{2x^4+2x+4x+4x}{x^2+x} \\\\\\\large \dfrac{2x ~. ~(x^3 + 5)}{x(x + 1)} \\\\\\\large \dfrac{2\not x ~. ~(3x^3 + 5)}{\not x(x + 1)} \\\\\\\boxed{ ~\large \dfrac{2x^3 + 10}{x + 1} ~}$

c)

$\large (4x+3x-2) + (-7x^2+-5) + (5x^2+2x^2-x+2) \\\\\large 4x+3x-2 -7x^2-5 +5x^2+2x^2-x+2 \\\\\large -7x^2+5x^2+2x^2+4x+3x-x-2-5+2 \\\\\large 6x-2-5+2 \\\\\boxed{~\large 6x-5 ~}$

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