1. Reduce to their simplest forms— 2. (1) Square (a+b√−1)*+(a−b√=1)3. (2) Extract the square root of 31-12-5. (3) 7√45+2√180+11√245. (4) 22/4×32/54. 3 (5) (x*—xy1+x‡y—y3)+(x*—y3). 4. (1) Show that if x+√ÿ=a+√b, x=a, y=b, and apply the principle to determine the square root of 12-4/5. (2) (√5−√2) (√2+1) (√3+√2) (√2-1). 10. Square 3√2—2√7, and extract the square root of 12. (1) Prove that {√3+4√=I+√/3−4√=1}' = (2) Simplify √7+4√3+√7−4√3. |