\(x+\sqrt{5-x^2}+x\sqrt{5-x^2}=5\)
x/2-{3x/5-13/5}=-{7/5+7/10*x}
\(2\sqrt{x^2+4x-5}+x\sqrt{x+5}=x+5-\sqrt{x+5}+2\left(x+1\right)\sqrt{x-1}\)
5√2 - 2√5 / √2 -√5 - 2/ √10 -3 + 20/ √10 +6
Rút gọn
A = 2/(√x-5)-2/(√x+5)+10√x/(x-5)
(căn 20 - căn 5 + căn 45) : căn 5
\(x^2+\sqrt{x+5}=5\)
\(x^2-\sqrt{x+5}=5\)
a. √(x2+12) + 5 = 3x + √(x2+5)