Question

formula reduzida(x-2)²-(x+1).(x-1)=(x-3²)-(x-4)²

Answer 1

x²-4-(x+1).(x-1)=(x-3²)-

x²-16

x²-4-x²-x+x-1=x-3²-x²-16

x²-x²+3²+x²-x+x-x+16-4

4x²-x+12