Question

Calculati:
a.[2x-y-(x-2y)][3x-2y-(2x-3y)]
b.[(x-1)(1+x)(x la a 2+1)+1]:x la a 2

Answer 1

a)[2x-y-(x-2y)][3x-2y-(2x-3y)]=[2x-y-x+2y][3x-2y-2x+3y]=[x+y][x+y]=[x+y]la a 2

b)[(x-1)(1+x)(x la a 2+1)+1]:x la a 2=[x la a 2    -1]x la a 3    +1:x la a 2=x la a5   -x la a 3   +1:x la a2