1 Rút gọn
a \(\frac{\sqrt{10}+\sqrt{15}}{\sqrt{6}+\sqrt{12}}\)
b \(\frac{x+\sqrt{xy}}{y+\sqrt{xy}}\)
c \(\sqrt{a^2.\left(a-2\right)^2}\)
2 Tìm x
a \(\sqrt{19x}=15\)
b \(\sqrt{4x^2}=8\)
c) \(\sqrt{4\left(x+1\right)}=\sqrt{8}\)
d \(\sqrt{9\left(2-3x\right)^2}=6\)