v) if Z= 2- under root3 i find value Z.Z
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Z=2-√3
:•Z.Z=(2-√3)(2-√3)
or
(2-√3)²
(a-b)²=a²+b²-2ab
2²+{√3}²-2*2*√3
4+3-(4√3)
7-(4√3)
:•Answer:7-(4√3)
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