a la m totul la n =a la puterea m*n 1/3 la puterea25*4:1/3 la puterea 99=1/3 la puterea 100:1/3 la 99=1/3 la impartire de puteri exponentii se scad 2)se aplica legea proportiilor 3(3x-2y)=2(4x+y) 9x-6y=8x+2y 9x-8x=2y+6y x=8y x/y=8 3) folosesti formula d=l√2 (latura radical din 2) 18=l√2 l=18/√2 rationalizezi l=18√2/2=9√2 A=l² A=9√2³=9²*√2²=81*2=162
