Question

1- Efetue as adições algébricas dos monômios a seguir.
prfvr gentee!

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Answer 1

Explicação passo-a-passo:

a)

$\sf 7x^2+2x^2-6x^2$

$\sf =9x^2-6x^2$

$\sf =\red{3x^2}$

b)

$\sf 20xy-17xy-5xy$

$\sf =3xy-5xy$

$\sf =\red{-2xy}$

c)

$\sf 2ab+1,5ab-2,3ab$

$\sf =3,5ab-2,3ab$

$\sf =\red{1,2ab}$

d)

$\sf =-3,1x^2y+4,5x^2y-2,7x^2y$

$\sf =1,4x^2y-2,7x^2y$

$\sf =\red{-1,3x^2y}$

e)

$\sf 10bc-12bc+7bc-3bc$

$\sf =-2bc+7bc-3bc$

$\sf =5bc-3bc$

$\sf =\red{2bc}$

f)

$\sf 1,1ab^3-3,5ab^3-0,9ab^3+2,8ab^3$

$\sf =-2,4ab^3-0,9ab^3+2,8ab^3$

$\sf =-3,3ab^3+2,8ab^3$

$\sf =\red{-0,5ab^3}$

g)

$\sf \dfrac{1}{3}x^2y^2-\dfrac{5}{6}x^2y^2+\dfrac{4}{9}x^2y^2$

$\sf =\dfrac{6\cdot1}{18}x^2y^2-\dfrac{3\cdot5}x^2y^2+\dfrac{2\cdot4}{18}x^2y^2$

$\sf =\dfrac{6}{18}x^2y^2-\dfrac{15}{18}x^2y^2+\dfrac{8}{18}x^2y^2$

$\sf =\dfrac{-9}{18}x^2y^2+\dfrac{8}{18}x^2y^2$

$\sf =\red{\dfrac{-1}{18}x^2y^2}$

Answer 2

Resposta:

a)3x^2

b)-2xy

c)1,2 Av

d)-1,3x^2y

e)2 Av

f)-0,5 Av

g)-1/18 x^2 y^2