(1+√2)^4=ab√2ab=(1+√2)^4/√2 =(1+√2)²(1+√2)²/√2 =(1+2√2+2)(1+2√2+2)/√2 =(3+2√2)²/√2 =(9+12√2+8)/√2 =(17+12√2)/√2 =(17√2+24)/2∴ab=12+17/2√2...