(x + 5) x (x + 6) =650
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
5^x + 5^ ( x + 2 ) = 650
5x + 5x . 52 = 650
5x .( 1 + 25 ) = 650
5x . 26 = 650
5x = 650 : 26
5x = 25
5x = 52
=> x = 2
Vậy x = 2
a)5x+5x+2=650
2*5x+2=650
2(5x+1)=650
5x+1=650/2
5x+1=325
5x=325-1
5x=324
=>x \(\in\phi\)
b)3x-1+5*3x-1=162
3x-1(1+5)=162
3x-1=162/6
3x-1=27=33
=>x-1=3
x=3+1
x=4
c)(2x-1)6=(1-2x)8
(2x-1)6=(-2x-1)8=(2x-1)8=(2x-1)6*(2x-1)2
=>(2x-1)2=1
2x-1=1
2x=1+1
2x=2
x=2/2
x=1
*)2x-1=0
2x=0+1
2x=1
x=1/2
a. 3.(5+2+3)=30
b. 9.(2+5+3)=90
c. 8.(5-2+6)=72
d. (1000-298).(140:14-10)=702.0=0
\(\frac{1}{3}.x+650\%x-x=-6\)
\(x.\left(\frac{1}{3}+650\%-1\right)=-6\)
\(\frac{35}{6}.x=-6\)
\(x=-6:\frac{35}{6}\)
\(x=-\frac{36}{35}\)
~ Thiên Mã ~
\(\frac{1}{3}x+650\%x-x=-6\)
\(\frac{1}{3}x+\frac{13}{2}x-x=-6\)
\(x\left(\frac{1}{3}+\frac{13}{2}-1\right)=-6\)
\(x\left(\frac{2}{6}+\frac{39}{6}-\frac{6}{6}\right)=-6\)
\(x\frac{35}{6}=-6\)
\(x=-6.\frac{35}{6}\)
\(x=-35\)
\(\Rightarrow x=-35\)
\(\frac{1}{3}x+650\%\cdot x-x=\left(-6\right)\)
\(\Rightarrow\frac{1}{3}x+6,5\cdot x-x=\left(-6\right)\)
\(\Rightarrow x\left(\frac{1}{3}+6,5-1\right)=\left(-6\right)\)
\(\Rightarrow x\left(\frac{1}{3}+\frac{13}{2}-1\right)=\left(-6\right)\)
\(\Rightarrow x\left(\frac{2}{6}+\frac{39}{6}-\frac{6}{6}\right)=\left(-6\right)\)
\(\Rightarrow x\left(\frac{2+39-6}{6}\right)=\left(-6\right)\)
\(\Rightarrow x\cdot\frac{35}{6}=\left(-6\right)\)
\(\Rightarrow x=\left(-6\right):\frac{35}{6}\)
\(\Rightarrow x=-\frac{36}{35}\)
a, (2x-1)^6= (2x-1)^8
=>2x-1=1 hoặc 2x-1=0
2x=2 hoặc 2x=1
x=1 hoặc x=1/2
b, 5^x + 5^x+2= 650
5x+5x.52=650
5x(1+52)=650
5x.26=650
5x=650:26
5x=25
5x=52
=>x=2
b, 5^x + 5^x+2 = 650
5^x ( 1 + 5^2) = 650
5^x . 26 = 650
5^x =650:26
5^x = 25
5^x = 5^2
x = 2
c) 5x+5x+2=650
=> 5x+5x52 = 650
=> 5x ( 1+ 25 ) = 650
=> 5x = 650 / 26
=> 5x = 25 = 52
=> x = 2
(x+5) x (x+6)=650
x + (5 x 6)=650
x + 30 =650
x =650-30
x =620