Question

simplifique as espressoes algébricas:
A-)5y²-(-4y²+7y²)+(-y²+9y²-11y²)
B-)10ab-[3ab-(ab+2ab-5ab)-8ab]
C-)2xy+[-5xy+2xy-(xy+4xy-2xy)-8xy) 
Ajudem-me por favor

Answer 1

$a)5y^2-(-4y^2+7y^2)+(-y^2+9y^2-11y^2) \\5y^2+4y^2-7y^2-y^2+9y^2-11y^2 \\ -y^2$

$b)10ab-[3ab-(ab+2ab-5ab)-8ab] \\ 10ab-3ab-ab-2ab+5ab-8ab \\ ab$

$c)2xy+[-5xy+2xy-(xy+4xy-2xy)-8xy) \\ 2xy-5xy+2xy-xy-4xy+2xy-8xy \\ -12xy$

Answer 2

Resposta:

a)5y^2-(-4y^2+7y^2)+(-y^2+9y^2-11y^2) \\5y^2+4y^2-7y^2-y^2+9y^2-11y^2 \\ -y^2  

b)10ab-[3ab-(ab+2ab-5ab)-8ab] \\ 10ab-3ab-ab-2ab+5ab-8ab \\ ab

c)2xy+[-5xy+2xy-(xy+4xy-2xy)-8xy)  \\ 2xy-5xy+2xy-xy-4xy+2xy-8xy \\ -12xy

Explicação passo-a-passo: