Question

с)
$4\sqrt{84} - 10 \sqrt{189} - 12 \sqrt{1029} + 2 \sqrt{525}$
d)
$5 \sqrt{243} + 2 \sqrt{48 - (8 \sqrt{300} } - 6 \sqrt{363)}$
Vă rog ​

Answer 1

Răspuns:

Subpunctul d l-ai scris corect?

Answer 2

$\it c) \ 4\sqrt{84}=4\sqrt{4\cdot21}}=8\sqrt{21}\\ \\ 10\sqrt{189}=10\sqrt{9\cdot21}=30\sqrt{21}\\ \\ 12\sqrt{1029}=12\sqrt{49\cdot21}=84\sqrt{21}\\ \\ 2\sqrt{525}=2\sqrt{25\cdot21}=10\sqrt{21}$

Expresia devine:

$\it 8\sqrt{21}-30\sqrt{21}-84\sqrt{21}+10\sqrt{21}=18\sqrt{21}-114\sqrt{21}=-96\sqrt{21}$