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2 votes
(2√5 + 3√7)^2 show your work and justify each step.

Thank you!

User EnToutCas
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2 Answers

4 votes
(2√(5) + 3√(7))²
(2√(5) + 3√(7))(2√(5) + 3√(7))
2√(5)(2√(5) + 3√(7)) + 3√(7)(2√(5) + 3√(7))
2√(5)(2√(5)) + 2√(5)(3√(7)) + 3√(7)(2√(5)) + 3√(7)(3√(7))
4√(25) + 6√(35) + 6√(35) + 9√(49)
4(5) + 12√(35) + 9(7)
20 + 12√(35) + 63
20 + 63 + 12√(35)
83 + 12√(35)
User ABentSpoon
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7 votes

(2 √(5) + 3 √(7) )^2 \\ \\ (2 √(5) ) ^2 + 2 * 2 √(5) * 3 √(7) + (3 √(7) ^2 \\ \\ 2^2 √(5) ^2 + 2 * 2 √(5) * 3 √(7) + (3 √(7) )^2 \\ \\ 4 √(5) ^2 + 2 * 2 √(5) * 3 √(7) + (3 √(7) )^2 \\ \\ 4 * 5 + 2 * 2 √(5) * 3 √(7) + (3 √(7) )^2 \\ \\ 4 * 5 + 2 * 2 √(5) * 3 √(7) + 3^2 √(7) ^2 \\ \\ 4 * 5 + 2 * 2 √(5) * 3 √(7) + 9 √(7) ^2\\ \\ 4 * 5 + 2 * 2 √(5) * 3 √(7) + 9 * 7 \\ \\ 20 + 2 * 2 √(5) * 3 √(7) + 9 * 7 \\ \\ 20 + 2 * 2 * 3 √(5 * 7) + 9 * 7 \\ \\ 20 + 2 * 2 * 3 √(35) + 9 * 7 \\ \\ 20 + 12 √(35) + 9 * 7 \\ \\ 20 + 12 √(35) + 63 \\ \\ 83 + 12 √(35) \\ \\

The answer is: 83 + 12√35.
User Pro Q
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