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A-
A
A+
Write the value of (2+
) (2-
).
(2+√3) (2-√3)
= (2)
2
- (√3)
2
[(a+b) (a-b) = a
2
–b
2
]
= 4 – 3 = 1.
1
) (2-
).) (2-).