Question

14) Efetue as operações com Monômios

15) Efetue as Seguintes operacoes

16) Observe as formas Planas

Answer 1

14) c -

$(3xy)(-5x^2)(-y)=\\(-15x^3y)(-y)\\15x^3y^2$

D )

$(-2a^2bc)(9ab^3c)(abc)\\(-18a^3b^4c^2)(abc)\\-18a^4b^5c^3$

E)

$(-30a^4b^8):(-6ab^5)\\5a^3b^3$

F)

$(-5a^3x):(10a^2)\\-ax/2$

G)

$(-20x^3)^2\\400x^6$

H)

$(-3m^2n)^5\\(-3)^5(m^2)^5(n)^5\\-243m^{10}n^5$

15) A-

$(24a^2b^3-18a^3b^4-6ab^5):(3ab^3)\\(24a^2b^3-18a^3b^4-6ab^5)/3ab^3\\3ab^3(8a-6a^2b-2b^2)/3ab^3\\8a-6a^2b-2b^2$

B--

$(12x^3y^5-16x^4y^3+20x^5y^2):(-4x^2y)\\(12x^3y^5-16x^4y^3+20x^5y^2)-4x^2y\\4x^2y(3xy^4-4x^2y^2+5x^3y)/-4x^2y\\-3xy^4+4x^2y^2-5x^3y$

C-

$(2x^2-14x+24)/(x-3)\\2(x^2-3x-4x+12)/x-3\\2(x-3)(x-4)/x-3\\2(x-4)$

16- A)

$2(2x+1) + 2(x-1)\\4x+2+2x-2\\6x$

$(a+8) + (a +b ) + 4b + (2a+5b-2)\\2a+5b+8+2a+5b-2\\4a+10b+6$

B)

$6x=24\\x=24/6\\x=4cm$

C)

$4a+10b+6 = 84\\4(7)+10b+6 = 84\\10b+34=84\\b=(84-34)/10\\b= 5cm$