Răspuns:
h)
x²/4-6x/2+9+x²-6x/2+9/4+x²/4-1+9x²/4-12x/2+4=11x²/4-24x/2+13+2x²=11x²/4+8x²/4-24x/2+13+2x²=19x²/4-24x/2+13+2x²
j)
4x²-4x/2+1/4+x²/4-1/9-9x²/4-12x/2+4-5/36=4x²-16x/2-8x²/4+1/4-1/9+4-5/36=16x²/4-8x²/4-16x/2+1/4+1/9+4-5/36=8x²/4-16x/2+72/36+4-5/35=8x²/4-16x/2+67/36+144/36=8x²/4-16x/2+211/36
