Question

Simplifique as expressões algébricas.
A) 10ab-[3ab-(ab+ 2ab-5ab)-8ab]
B) 2xy+[-5xy+2xy-(xy+4xy-2xy)-8xy]
C) 1,2ax-(-0,6ax+3,4ax-2,9ax)-(7,3ax-0,8ax)

Me ajudem pfv

Answer 1

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

10ab-[3ab-(-2ab)-8ab]=>10ab-[3ab+ab-8ab]=>10ab-[-4ab]

=>10ab+4ab ==>  14ab
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B) 2xy+[-5xy+2xy-(xy+4xy-2xy)-8xy]

2xy+[-5xy+2xy-(3xy)-8xy]=>2xy+[-5xy+2xy-3xy-8xy]

2xy+[-14xy]=> 2xy - 14xy ==> - 12xy
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C) 1,2ax-(-0,6ax+3,4ax-2,9ax)-(7,3ax-0,8ax)

1,2ax-(-0,1ax)-(6,5ax) => 1,2ax+0,1ax-6,5ax ==> - 5,2ax