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`(7x-11)^3 =5^2 *2^5 +200`
`=>(7x-11)^3 =25*32+200`
`=>(7x-11)^3 =800+200`
`=>(7x-11)^3 =1000`
`=>(7x-11)^3 =10^3`
`=>7x-11=10`
`=>7x=10+11`
`=>7x=21`
`=>x=21:7`
`=>x=3`
(7x-11)3 = 1000(tính ra r nhé)
(7x-11)3 = 103
7x-11 = 10
7x = 21
x = 3
(7x - 11)^3 = 2^ 5 .5^2+200 = 1000
(7x - 11)^3 = 10^ 3
=> 7x - 11 = 10
=> 7x = 21 =>
x = 3
(7x-11)^3=2^5.5^2+200
(7x-11)^3=1000
7x-11 =10
7x =10+11
7x =21
x =21:7
x =3
Ta có:(7x-11)3=25 * 52 + 200
=> (7x-11)3=32 * 25 + 200
=> (7x-11)3=800 + 200
=> (7x-11)3=1000 = 103
=> 7x-11 = 10
=> 7x = 21
=> x = 3
(7x - 11 )^3 = 32*25+200
(7x - 11 ) ^3 = 1000
(7x-11)^3 = 10^3
=> 7x - 11 = 10 => 7x = 11 + 10 = 21 => x = 21 : 7 => x = 3
\(\left(7x-11\right)^3=2^5.5^2+200\)
\(\Leftrightarrow\left(7x-11\right)^3=1000\)
\(\Leftrightarrow7x-11=10\)
\(\Leftrightarrow7x=21\)
\(\Leftrightarrow x=3\)
\(\left(7x-11\right)^3=2^5.5^2+200\)
\(\Rightarrow\left(7x-11\right)^3=32.25+200\)
\(\Rightarrow\left(7x-11\right)^3=800+200\)
\(\Rightarrow\left(7x-11\right)^3=1000=10^3\)
\(\Rightarrow7x-11=10\)
\(\Rightarrow7x=21\)
\(\Rightarrow x=3\)
( 7x - 11 )^3 = 2^ 5 . 5^ 2 + 200
( 7x - 11 )^3 = 32 . 25 + 200
( 7x - 11 )^3 = 800 + 200
( 7x - 11 )^3 = 1000
( 7x - 11 )^3 = 10^ 3
=>7x - 1^1=10
7x=10+11
7x=21
x=21:7
x=3