Question

sabendo a=2x-3 b=3x c=x+ 1 caucule 2.(a-b).c

Answer 1

Olá!


$2\cdot (a-b)\cdot c=2\cdot[(2x-3)-(3x)]\cdot (x+1)=\\ \\ = 2\cdot (2x-3-3x)\cdot(x+1)=2\cdot(-x-3)\cdot(x+1)=\\ \\ = (-2x-6)\cdot(x+1)=-2x^2-2x-6x-6=-2x^2-8x-6.$



Bons estudos!