faithschuck faithschuck

21-07-2016
Mathematics

contestada

Solve and check....9^x = 3^x - 2

Respuesta :

apologiabiology apologiabiology

21-07-2016

remember that
logₐx=y means a^y=x
also
if a^n=a^m where a=a, then n=m

try to match bases
remember that 9=3^2
9^x=3^(2x)

3^(2x)=3^(x-2)
2x=x-2
minus x from both sides
x=-2

x=-2

to check

9^-2=3^(-2-2)
1/(9^2)=3^(-4)
1/81=1/(3^4)
1/81=1/81

true

x=-2

Answer Link

Otras preguntas

What were the causes and consequences of the french civil war of 1559 to 1589?

which of the following is a radical equation a. x^2 +4x-10=0 b\/~~~~~ x+2 =4 c. y= 3x+2 d. y=2^x

what was the struggle to receive full voting rights for women also called

A mutation results in an enzyme that is partially active compared to the wild-type allele. this type of "leaky" mutation is classified as

4(20 divided by 12) divided by (4-3)

Which group of measurements is the most precise? (each group of measurements is for a different object.) a. 1 g, 3 g, 5 g b. 2 g, 2.5 g, 3 g c. 2.0 g, 3.0 g,

True or false all odd numbers are divisible by 3

Name one area in which Americans were calling for reform at the turn of the twentieth century.

By 2000 the average age at first marriage had risen to age ______ for women and _______ for men. A- 18.3; 19.5 B- 25.1; 26.8 C- 30.1; 32.5 D- 20.3; 22.8

Choose the best Spanish phrase to complete the following sentence. Yo _____________ con mi madre. Question 9 options: esto hablar está hablando estás hablando e