ntiers
69 A=(2√3-3√2)(3-√3+2√2)
B=(√2-3√3)(√3-2√√2)
3
; C = (1+2√3)(5-3√3)
70 A = (2+ √5)(3-√5)
B=(√5 + 3)(√5 - 1)
$C=(√3+2)(√3-2)
D = (2√√3-5)(3-4√3)
XZ1 A=(2√13 +7√5)(2√13-7√5)
B = √2 (3+√2)-√3 (2+√3)
C=(√3-1)-2(1-√3) + 3√3
D=(√2 + √3)(√8 +4√2)