✓5-2 - ✓5+2
_________
✓5+2. ✓5-2
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√5-2-√5+2
_________
√5+2×√5-2
=√5-2-√5+2
_________
√5²-2²
=√5-2-√5+2
__________
5-4
=√5-2-√5+2
=√5-√5+(-2)+2
=0
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