Question

Vreau rezolvarea cu poza va rogggggggggggggg​

Answer 1

Răspuns:

$ma = \frac{x + y}{2}$

$= \frac{2 \sqrt{8} - \sqrt{7} + 7 \sqrt{7} - 2 \sqrt{2} }{2}$

$= \frac{2 \times 2 \sqrt{2} - 2 \sqrt{2} + 7 \sqrt{7} - \sqrt{7} }{2}$

$= \frac{(4 - 2) \sqrt{2} + (7 - 1) \sqrt{7} }{2}$

$= \frac{2 \sqrt{2} + 6 \sqrt{7} }{2} = \sqrt{2} + 3 \sqrt{7}$