Question

simplify ( 7 √3 -√5 )²

Answer 1

Answer:

$(7 \sqrt{3} - \sqrt{5} )^{2} \\ \\ = (7 \sqrt{3} )^{2} + ( \sqrt{5} ) ^{2} - 2 \times 7 \sqrt{3} \times \sqrt{5} \\ \\ \\ = 49 \times 3 + 5 - 14 \sqrt{15} \\ \\ \\ = 147 + 5 - 14 \sqrt{15} \\ \\ \\ = 152 - 14 \sqrt{15} \: \: \: answer...$

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Answer 2

Answer:

16 is the answer

Step-by-step explanation:

(7root 3)^2 - (root5)^2

21 - 5

16