Question

reduza o termo abaixo
4(a²+a+2)-3(a²+2-2)-(a²+3a-3)
a²-b²+2a²-7b²
x(x-xy+y²)+y(x²-xy+y²)

Answer 1

4(a²+a+2)-3(a²+2-2)-(a²+3a-3)
4a² + 4a + 8 - 3a² - 6+ 6 - a² - 3a + 3
4a² - 3a² - a² + 4a - 3a + 8 - 6 + 6 + 3
  a + 11

a² - b² + 2a² - 7b²
a² + 2a² - b² - 7b²
3a² - 8b² 

x(x-xy+y²)+y(x²-xy+y²)

x² - x²y + xy² + yx²- xy²+y³

   x² + y³

Answer 2

4(a²+a+2)-3(a²+2-2)-(a²+3a-3)
4a²+4a+8-3a²-6+6-a²-3a+3
4a²-3a²-a²+4a-3a+8-6+6+3
a+11

a²-b²+2a²-7b²
a²+2a²-b²-7b²
3a²-8b²

x(x-xy+y²)+y(x²-xy+y²) 
x²-x²y+xy²+x²y-xy²+y³
x²-x²y+x²y+xy²-xy²+y³
x²+y³