Question

ax-[-bx-(ab+ax-bx)+2ab]-(2ax-ab)

Com conta... por favor :D

Answer 1

ax-[-bx-ab-ax+bx+2ab] -2ax+ab
ax+bx+ab+ax-bx-2ab-2ax-ab
ax+ax-2ax+bx-bx+ab-ab-2ab
2ax-2ax-2ab
-2ab

Answer 2

ax-[-bx-(ab+ax-bx)+2ab]-(2ax-ab)
ax-[bx-ab-ax+bx+2ab]-2ax+ab
ax-bx+ab+ax-bx-2ab-2ax+ab
2ax-2bx+2ab-2ax-2ab
R= -2bx