Question

calculati:c)2-√28-3+√63;d)√54-√24-√180+7√5​

Answer 1

c)

$2 - \sqrt{28} - 3 + \sqrt{63}$

$2 - 2 \sqrt{7} - 3 + 3 \sqrt{7}$

$- 1 + \sqrt{7}$

$= 1.64575$

d)

$\sqrt{54} - \sqrt{24} - \sqrt{180} + 7 \sqrt{5}$

$3 \sqrt{6} - 2 \sqrt{6} - 6 \sqrt{5} + 7 \sqrt{5}$

$\sqrt{6} + \sqrt{5}$

$= 0.213422$