Question

oblicz :
a) (√2 + √7)^2

Answer 1

Odpowiedź:

[tex]( \sqrt{2} + \sqrt{7} ) ^{2} = ( \sqrt{2} + \sqrt{7} ) \times ( \sqrt{2} + \sqrt{7} ) = \sqrt{2} \times \sqrt{2} + \sqrt{2} \times \sqrt{7} + \sqrt{7} \times \sqrt{2} + \sqrt{7} \times \sqrt{7} = 2 + \sqrt{14} + \sqrt{14} + 7 = 9 + 2 \sqrt{14} [/tex]