bài 1: rút gọn các biểu thúc sau
a, frac{sqrt{1-2x+x^2}}{x-1}
b, frac{sqrt{left(x-3right)^2}}{3-x}
c, frac{sqrt{9x^2-6x+1}}{9x^2-1}
d, 4-x-sqrt{4-4x+x^2}
bài 2 rút gọn
a, frac{sqrt{6}+sqrt{10}}{sqrt{21}+sqrt{35}}
b, frac{sqrt{405+3sqrt{27}}}{3sqrt{3}+sqrt{45}}
c, frac{sqrt{2}+sqrt{3}+sqrt{4}-sqrt{6}-sqrt{9}-sqrt{12}}{sqrt{2}+sqrt{3}+sqrt{4}}
d, frac{sqrt{6-2sqrt{5}}}{sqrt{5}-1}
Đọc tiếp
bài 1: rút gọn các biểu thúc sau
a, \(\frac{\sqrt{1-2x+x^2}}{x-1}\)
b, \(\frac{\sqrt{\left(x-3\right)^2}}{3-x}\)
c, \(\frac{\sqrt{9x^2-6x+1}}{9x^2-1}\)
d, 4-x-\(\sqrt{4-4x+x^2}\)
bài 2 rút gọn
a, \(\frac{\sqrt{6}+\sqrt{10}}{\sqrt{21}+\sqrt{35}}\)
b, \(\frac{\sqrt{405+3\sqrt{27}}}{3\sqrt{3}+\sqrt{45}}\)
c, \(\frac{\sqrt{2}+\sqrt{3}+\sqrt{4}-\sqrt{6}-\sqrt{9}-\sqrt{12}}{\sqrt{2}+\sqrt{3}+\sqrt{4}}\)
d, \(\frac{\sqrt{6-2\sqrt{5}}}{\sqrt{5}-1}\)