1) Simplify ( root 3 - root 7 ) ^ 2
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Step-by-step explanation:
(√3 - √7)^2
= (√3)^2 - 2 × √3 × √7 + (√7)^2
= 3 - 2 × √21 + 7
= 10 - 2√21
= 2 ( 5 - √21 )
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