a amplica inseamna a inmultii numitorul si numaratorul cu numarul respectiv
deci
prima:( 2x-3)(4x-3) supra (3x+1)(4x-3) = 8xpatrat -6x-12x+9 supra 12xpatrat-9x+4x-3 = 8xpatrat-18x+9 supra 12xpatrat -5x-3
a doua:(xpatrat-2x-2)(x+1) supra (xpatrat-x+1)(x+1)=xcub +xpatrat-2xpatrat-2x-2x-2 supra xcub +xpatrat-xpatrat-x+x+1=xcub-xpatrat-4x-2 supra xcub+1
