Question

[10.02] Solve the proportion 2 times x all over 9 times x minus 8 equals 2 over x.. What is the value of x?

x = 1 and x = 9

x = -1 and x = -9

x = 1 and x = 8

x = -1 and x = 8

Answer 1

Do you know why I can't draw? :(
2x 2
9x-8 = x
You have to cross multiply these and then use the quadratic formula.

Answer 2

I know that

Answer 3

Alrighty then what do you get?

Answer 4

2x and 18 or 16 i dont know

Answer 5

I got 2x^2 -18x+16=0 and then used the quadratic formula on that.

Answer 6

ok then what

Answer 7

Then you get the answer.

Answer 8

But are choices are x = 1 and x = 9

x = -1 and x = -9

x = 1 and x = 8

x = -1 and x = 8

Answer 9

You have to do the quadratic formula before you get the answer. it is
(-b-sqrt(b^2-4ac))/2a
and (-b+sqrt(b^2-4ac))/2a