Friday

April 18, 2014

April 18, 2014

Posted by **Anonymous** on Monday, December 5, 2011 at 9:40pm.

i know that x^2+6x+9=2x^2+5x+3

and

6=x^2-x

(i forgot basic algebra)

- geometry -
**Reiny**, Monday, December 5, 2011 at 10:15pmthen (x+3)/(x+1) = (2x+3)/(x+3)

crossmultiply

2x^2 + 5x + 3 = x^2 + 6x + 9

x^2 - x - 6 = 0

(x-3)(x+2) = 0

x = 3 or x = -2

if x = 3, the 3 terms are 4, 6, and 9

(note 6/4 = 9/6)

if x = -2, the 3 terms are 0, 1, and -1

but that is not possible, if the first term of a geometric sequence is zero, all the remaining terms would be zero.

so x = 3

**Related Questions**

Geometry-8th gr - The geometric mean x of two numbers is the positive value of x...

geometric mean - The geometric mean of two postitive numbers a and b is sqrt(ab...

geometric mean - Eighteen is the Geometric Mean of 12 and what number 18 = sqrt...

geometry - Find the geometric mean between 7 and 21 I do not have a clue where ...

geometry - What is the geometric mean of 7 and 12?

geometry - what is the geometric mean of 75 and 27?

Geometry/trig - How do I find the geometric mean between 12 and 2.4?

math - What is the difference between geometric mean and arithmetic mean? ...

Geometry - Find the geometric mean between 6x and 24x. A.)4 B.)12 C.)12x

geometry - Find the geometric mean each pair of numbers. If nessary, give the ...