\(\left(\sqrt{5}-\sqrt{7}\right)^2\)=\(\sqrt{5^2}-\sqrt{7^2}\)=\(5-7=-2\)
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\(\left(\sqrt{5}-\sqrt{7}\right)^2\)=\(\sqrt{5^2}-\sqrt{7^2}\)=\(5-7=-2\)
rut gon
5/2 can 7
Rut gon bieu thuc sau
(15√200 - 3√450 + 2√50) : √10
Minh can sieu nhanh ma phai dung, Thanks truoc nha!!
rut gon
can (12-6can3) - can (21-12can3)
rut gon mo ngoac don 1 tru can 2 tat ca mu 2
Rut gon bieu thuc:
(3√2+√10)×√(38-12√5)
Cho bieu thuc:
P=\(\frac{1}{\sqrt{x}+2}-\frac{5}{x-\sqrt{x}-6}-\frac{\sqrt{x}-2}{3-\sqrt{x}}\)
a. Rut gon bieu thuc P
b.Tim GTLN cua P sau khi rut gon
rut gon bieu thuc (5√3+3√5)÷15
rut gon
can 16a^4b^6 / can 128a^6b^6 (a<0, bkhac 0)
\(\frac{a^5+a^6+a^7+a^8}{a^{-5}+a^{-6}+a^{-7}+a^{-8}}\)
Rut gon bieu thuc tren.