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-√3 (1 + 2 √3) = -√3-6
(5√2 - 1) (5 √2 + 1 ) =50+5√2-5√2-1
(2√2 - 1) ² = 8-4√2+1
(2√3 + 3 ) (3 - 2√3) =6√3-12+9-6√3
b)-√3-6
c)50-1
d)8-4√2+1
e)6√3-12+9-6√3=-3
b)-√3(1+2√3)=-√3-6
c)(5√2-1)(5√2+1)=50-1=49
d)(2√2-1)²=8-4√2+1=9-4√2
e)(2√3+3)(3-2√3)=9-12=-3