Question

СРОЧНО!! ДАЮ 25 БАЛЛОВ.
упростите:
Д) 4√2 + √72 - √18
Ж) (√13+5)(5-√13)
З) (4-5√2)²+2√8​

Answer 1

д)

$4 \sqrt{2} + \sqrt{72} - \sqrt{18} = 4 \sqrt{2} + 6 \sqrt{2} - \sqrt{18} = 10 \sqrt{2} - \sqrt{18} = 10 \sqrt{2} - 3 \sqrt{2} = 7\sqrt{2}$

ж)

$( \sqrt{13} + 5)(5 - \sqrt{13} ) = (5 + \sqrt{13} ) \times (5 - \sqrt{13} ) = 25 - 13 = 12$

з)

$(4 - 5 \sqrt{2} ) {}^{2} + 2 \sqrt{8} = 16 - 40 \sqrt{2} + 50 + 4 \sqrt{2} = 66 - 36 \sqrt{2}$

Answer 2

Ответ:

Объяснение:

Д) $4\sqrt{2} + 6\sqrt{2} - 3\sqrt{2} = 7\sqrt{2}$

Ж) $(\sqrt{13} + 5)(5 - \sqrt{13}) = 25 - 13 = 12$

З) $16 - 40\sqrt{2} + 50 + 4\sqrt{2} = 66 - 36\sqrt{2}$