$2\log \left(x\right)-\log \left(x+6\right)=0$

Step-by-step Solution

Go!
Symbolic mode
Text mode
Go!
1
2
3
4
5
6
7
8
9
0
a
b
c
d
f
g
m
n
u
v
w
x
y
z
.
(◻)
+
-
×
◻/◻
/
÷
2

e
π
ln
log
log
lim
d/dx
Dx
|◻|
θ
=
>
<
>=
<=
sin
cos
tan
cot
sec
csc

asin
acos
atan
acot
asec
acsc

sinh
cosh
tanh
coth
sech
csch

asinh
acosh
atanh
acoth
asech
acsch

Final answer to the problem

$x=3$
Got another answer? Verify it here!

Step-by-step Solution

How should I solve this problem?

  • Choisir une option
  • Résoudre pour x
  • Simplifier
  • Facteur
  • Trouver les racines
  • Load more...
Can't find a method? Tell us so we can add it.
1

Apply the formula: $a\log_{b}\left(x\right)$$=\log_{b}\left(x^a\right)$

$\log \left(x^2\right)-\log \left(x+6\right)=0$
2

Apply the formula: $\log_{b}\left(x\right)-\log_{b}\left(y\right)$$=\log_{b}\left(\frac{x}{y}\right)$, where $b=10$, $x=x^2$ and $y=x+6$

$\log \left(\frac{x^2}{x+6}\right)=0$
3

Apply the formula: $\log_{b}\left(x\right)=a$$\to \log_{b}\left(x\right)=\log_{b}\left(b^a\right)$, where $a=0$, $b=10$, $x=\frac{x^2}{x+6}$ and $b,x=10,\frac{x^2}{x+6}$

$\log \left(\frac{x^2}{x+6}\right)=\log \left(1\right)$
4

Apply the formula: $\log_{a}\left(x\right)=\log_{a}\left(y\right)$$\to x=y$, where $a=10$, $x=\frac{x^2}{x+6}$ and $y=1$

$\frac{x^2}{x+6}=1$
5

Apply the formula: $\frac{a}{b}=c$$\to a=cb$, where $a=x^2$, $b=x+6$ and $c=1$

$x^2=x+6$
6

Move everything to the left hand side of the equation

$x^2-x-6=0$
7

Factor the trinomial $x^2-x-6$ finding two numbers that multiply to form $-6$ and added form $-1$

$\begin{matrix}\left(2\right)\left(-3\right)=-6\\ \left(2\right)+\left(-3\right)=-1\end{matrix}$
8

Rewrite the polynomial as the product of two binomials consisting of the sum of the variable and the found values

$\left(x+2\right)\left(x-3\right)=0$
9

Break the equation in $2$ factors and set each factor equal to zero, to obtain simpler equations

$x+2=0,\:x-3=0$
10

Solve the equation ($1$)

$x+2=0$
11

Apply the formula: $x+a=b$$\to x+a-a=b-a$, where $a=2$, $b=0$, $x+a=b=x+2=0$ and $x+a=x+2$

$x+2-2=0-2$
12

Apply the formula: $x+a+c=b+f$$\to x=b-a$, where $a=2$, $b=0$, $c=-2$ and $f=-2$

$x=-2$
13

Solve the equation ($2$)

$x-3=0$
14

Apply the formula: $x+a=b$$\to x+a-a=b-a$, where $a=-3$, $b=0$, $x+a=b=x-3=0$ and $x+a=x-3$

$x-3+3=0+3$
15

Apply the formula: $x+a+c=b+f$$\to x=b-a$, where $a=-3$, $b=0$, $c=3$ and $f=3$

$x=3$
16

Combining all solutions, the $2$ solutions of the equation are

$x=-2,\:x=3$

Verify that the solutions obtained are valid in the initial equation

17

The valid solutions to the logarithmic equation are the ones that, when replaced in the original equation, don't result in any logarithm of negative numbers or zero, since in those cases the logarithm does not exist

$x=3$

Final answer to the problem

$x=3$

Explore different ways to solve this problem

Solving a math problem using different methods is important because it enhances understanding, encourages critical thinking, allows for multiple solutions, and develops problem-solving strategies. Read more

Help us improve with your feedback!

Function Plot

Plotting: $2\log \left(x\right)-\log \left(x+6\right)$

SnapXam A2
Answer Assistant

beta
Got a different answer? Verify it!

Go!
1
2
3
4
5
6
7
8
9
0
a
b
c
d
f
g
m
n
u
v
w
x
y
z
.
(◻)
+
-
×
◻/◻
/
÷
2

e
π
ln
log
log
lim
d/dx
Dx
|◻|
θ
=
>
<
>=
<=
sin
cos
tan
cot
sec
csc

asin
acos
atan
acot
asec
acsc

sinh
cosh
tanh
coth
sech
csch

asinh
acosh
atanh
acoth
asech
acsch

How to improve your answer:

Your Personal Math Tutor. Powered by AI

Available 24/7, 365.

Complete step-by-step math solutions. No ads.

Includes multiple solving methods.

Download complete solutions and keep them forever.

Premium access on our iOS and Android apps.

Join 500k+ students in problem solving.

Choose your plan. Cancel Anytime.
Pay $39.97 USD securely with your payment method.
Please hold while your payment is being processed.

Create an Account