Question

simplifique cada uma das seguintes expressoes algebricas:
A) 7x - (-2x + 2x) + (-3x + 5x)
B) 5y² - (-4y² + 7y²) + (-y² + 9y² - 11y²)
C) 10ab - [3ab - (ab + 2ab - 5ab) - 8ab]
D) 2xy + [-5xy + 2xy-(xy + 4xy - 2xy) - 8xy]

Answer 1

a)7x-(-2x + 2x)+(-3x+5x)
7x-0+2x
7x+2x
9x
b)5y²-(-4y²+7y²)+(-y²+9y²-11y²)
5y²+4y²-7y²+(-3y²)
6y²-7y²-3y²
6y²-10y²
-4y²
c)2xy+[-5xy+2xy-(xy+4xy-2xy)-8xy]
2xy-5xy+2xy-xy-4xy+2xy-8xy
-3xy+xy-2xy-8xy
-2xy-10xy
-12xy