Question

ajutatima va rog la ex 8(h.i.j)

Answer 1

h)(a-2b)/12c × 18c²/(2b-a)=
=(a-2b)/2 × 3c/[-(a-2b)]=
=1/2 × 3c/(-1)=
=-3c/2

i)(3a-6b) × (a+2)/(a²-4b²)=
=3(a-2b) × (a+2)/(a-2b)(a+2b)=
=3 × (a+2)/(a+2b)=
=3(a+2)/(a+2b)

j)(x²-6x+9)/(x²-3x+9) ×(x³+27)/(3x-9)=
=(x-3)²/(x²-3x+9) ×(x³+3³)/3(x-3)=
=(x-3)/(x²-3x+9) ×(x+3)(x²-3x+9)/3=
=(x-3)/1 ×(x+3)/3=
=(x-3)(x+3)/3