Question

Q3 plz help with methord

Answer 1

answer .......................

Answer 2

The answer is given below :

Now,

${( \sqrt{5} + \sqrt{2} )}^{2} \\ \\ = {( \sqrt{5}) }^{2} + (2 \times \sqrt{5} \times \sqrt{2} )+ {( \sqrt{2}) }^{2} \\ \\ = 5 + 2 \sqrt{10} + 2 \\ \\ = 7 + 2 \sqrt{10}$

Alternatively :

${( \sqrt{5} + \sqrt{2} ) }^{2} \\ \\ = ( \sqrt{5} + \sqrt{2} )( \sqrt{5 } + \sqrt{2} ) \\ \\ = 5 + \sqrt{10} + \sqrt{10} + 2 \\ \\ = 7 + 2 \sqrt{10}$

Thank you for your question.