Question

como efetuar as operaçoes?

Answer 1

Bom dia Suelle!

Solução!

$[a)~~(x+2)\times(x-3)-(x-3)\times(x+2)\\\\\\ ( x^{2}-3x+2x-6)-( x^{2}+2x-3x-6)\\\\\\ ( x^{2} -x-6)-( x^{2} -x-6)\\\\\\\ ( x^{2} -x-6)+( -x^{2} +x+6)\\\\\ ( x^{2}- x^{2}-x+x-6+6)\\\\\ (0+0+0)=0$



$b)~~(8 x^{2}-4x+5)+(x-2)\\\\ (8 x^{2}-4x+5+x-2)\\\\ (8 x^{2}-3x+5-2)$




$c)~~(-4 x^{3}-3 x^{2}+x-5)+(x-3)\\\\\ (-4 x^{3}-3 x^{2}+x-5+x-3)\\\\\ (-4 x^{3}-3 x^{2}+2x-8)$



Bom dia!
Bons estudos!