Question

HELP ME!!! please !!!

Answer 1

1) а) у/5*(х-2) + у/6*(х-2)=11у/30х-60

б)21в²/2а

2)(х-5)*(х+5)/(х+3)*(х+5)*х-(х+5)/х*(х-3)=-16/х²-9

3)а)2²*2²*5*3²=720

б)11-6√2