(√3+√7) power to 2
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=(√3) power 2 + (√7) power 2 +2×√3×√7
=3 +7 +2√21
=10+2√21
=3 +7 +2√21
=10+2√21
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(√3+√7)2
now,(a+b)2=a2+b2+2ab
√3×√3+√7×√7+2×√3×√7
3+7+2√21
10+2√21
now,(a+b)2=a2+b2+2ab
√3×√3+√7×√7+2×√3×√7
3+7+2√21
10+2√21
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