Question

Write the conjugate of the complex number -√5-√7i​

Answer 1

Answer:

$- \sqrt{5} - \sqrt{7} \\ \\ =( - \sqrt{5} - \sqrt{7}) \times( - \sqrt{5} + \sqrt{7} ) \\ \\ = ( - \sqrt{5} )^{2} - ( \sqrt{7} ) ^{2} \\ \\ = 5 - 7 \\ \\ = - 2 \\ \\ so \: conjugate \: of \: - \sqrt{5} - \sqrt{7 } \\ \\ = - \sqrt{5} + \sqrt{7}$

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