\(\sqrt{9x-9}\)=12
Mà: \(\sqrt{144}\)=12
=> 9x-9=144
=>9x=144+9
=>9x=153
=>x=153:9
=>x=17
\(\Leftrightarrow9x-9=144\)
\(\Leftrightarrow9\left(x-1\right)=144\)
\(\Leftrightarrow x-1=16\)
\(\Leftrightarrow x=17\)
vậy..............................
\(\sqrt{9x-9}\)=12
Mà: \(\sqrt{144}\)=12
=> 9x-9=144
=>9x=144+9
=>9x=153
=>x=153:9
=>x=17
\(\Leftrightarrow9x-9=144\)
\(\Leftrightarrow9\left(x-1\right)=144\)
\(\Leftrightarrow x-1=16\)
\(\Leftrightarrow x=17\)
vậy..............................
a) \(\sqrt{4x^2-9}=2\sqrt{x+3}\)
b) \(\sqrt{4x+20}+3\sqrt{\dfrac{x-5}{9}}-\dfrac{1}{3}\sqrt{9x-45}=4\)
c) \(\dfrac{2}{3}\sqrt{9x-9}-\dfrac{1}{4}\sqrt{16x-16}+27\sqrt{\dfrac{x-1}{81}}=4\)
d)\(5\sqrt{\dfrac{9x-27}{25}}-7\sqrt{\dfrac{4x-12}{9}}-7\sqrt{x^2-9}+18\sqrt{\dfrac{9x^2-81}{81}}=0\)
Giải phương trình: \(5\sqrt{\frac{9x-27}{25}}-7\sqrt{\frac{4x-12}{9}}-7\sqrt{x^2-9}+18\sqrt{\frac{9x^2-81}{91}}=0\)
2.tìm x
a)\(\sqrt{x^2-6x+9}\)
b)\(\sqrt{x^2-2x+1}\)
c)\(\sqrt{4x+12}-3\sqrt{x+3}+7\sqrt{9x+27}=20\)
d)\(\sqrt{4x+20}+3\sqrt{\dfrac{x-5}{9}}-\dfrac{1}{3}\sqrt{9x-45}=6\)
tìm x biết
a, \(\sqrt{(x+3)^2}\)=12
b, \(\sqrt{25x-25}-\sqrt{9x-9}\)=10
\(25\sqrt{\dfrac{x-3}{25}}-7\sqrt{\dfrac{4x-12}{9}}-7\sqrt{x^2-9}+18\sqrt{\dfrac{9x^2-81}{81}}=0\)
Giải phương trình.
giúp e với ạaa :< gấp aa :((
Tìm x, biết:
b)\(5\sqrt{x-1}-\sqrt{36x-36}\)\(+\sqrt{9x-9}=\sqrt{8x+12}\)
Giải phương trình:
a) \(\sqrt{x^2+4}=\sqrt{2x+3}\)
b) \(\sqrt{x^2-6x+9}=2x-1\)
c) \(\sqrt{4x+12}=\sqrt{9x+17}-5\)
d) \(\sqrt{4x^2-6x+1}=\left|2x-5\right|\)
Tìm x biết:
a)\(\sqrt{4x-8}+5\sqrt{x-2}\)-\(\sqrt{9x-18}=20\)
b)\(5\sqrt{x-1}\)-\(\sqrt{36x-6}\)+\(\sqrt{9x-9}\)=\(\sqrt{8x+12}\)
2) giải pt
3) \(\sqrt{4x+1}=x+1\)
4) \(2\sqrt{x-1}+\dfrac{1}{3}\sqrt{9x-9}=15\)
5) \(\sqrt{4x^2-12x+9}=7\)
6) \(5\sqrt{9x-9}-\sqrt{4x-4}-\sqrt{x-1}=36\)
giúp mk vs ah