root 5 minus 2 upon root 5 + 2 whole minus root 5 + 2 upon root 5 minus 2
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=(sqrt (5) -2)^2 - (sqrt (5) +2)^2 whole thing ÷ (sqrt (5)+2)(sqrt(5)-2)
=-4× sqrt5 × 2 ÷ 5-4
=-8× sqrt5
identities used: (a+b)(a-b)= a squared - b squared [used in denominator]
(a+b)^2 - (a-b)^2 = 4ab [numerator]
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-8√5 is the answer...
HOPE THIS WILL HELP YOU....
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