Question

Solve 2^x - 8x + 10 = 0,x

Answer 1

First, divide both sides by 2.
Then try factoring or using the quadratic equation.

Answer 2

\[2^{x} - 8x + 10 = 0,x\]

Answer 3

What does 0,x mean?

Answer 4

The points on a graph?

Answer 5

Solve for x

Answer 6

Yes I know it's solving for x but I don't understand the last part of that equation

Answer 7

@mathstudent55 can you shed some light on this?

Answer 8

The equation ends in 0. The x means solve for x.

Answer 9

Oh, that ",x) confused me

Answer 10

Think of the instructions as being:

Solve each equation for the indicated variable:
\(3x = 6, x\)

Answer 11

Yeah I usually don't see equations in that format

Answer 12

I've come across a few like this, that 's how I figured it out.

Answer 13

Sorry, I just noticed the exponent x.
Forget what I wrote above.
I misread it.

Answer 14

How would we divide by 0 though? We would get undefined

Answer 15

divide 0 by 2

Answer 16

Yeah c;

Answer 17

\[2^{x} - 10 = 8x\]

Add 8x to both sides = 1st step?

Answer 18

@mathstudent55

Answer 19

Yeah and its plus 10!

Answer 20

You can use rules of logarithms to get rid of x from the exponent.

Answer 21

First, 0/2 is not undefined.
0/2 = 0
2/0 is undefined.

Second, since this equation has an exponent of x, forget all my instructions above, including dividing both sides by 2. I misread the first term as 2x^2.

Answer 22

\[\ln(C^x) = xln(C)\]

Answer 23

The problem with taking logs is that you will end you with a sum or difference involving a variable, and we can't simplify such a log.
I only know how to solve this by trying to graph it and then by trial and error to see where the zeros are.

Answer 24

Forgot about that 8x.

Answer 25

Are you sure it is not\[x^2\] @Swqaedf

Answer 26

Yes. It's 2^x

Answer 27

one solution is to graph the curve and identify the zeros...

or use an approximation method...

using a table of values the zeros and between 1 and 2, then 4 and 5

hope it helps