81 x 2 - 16 = 146
x5
26
x9/x2 = x9-2 = x7
x2-x-56 = (x+7)(x-8) when factored
Just X to the second power minus nine. You can't subtract nine from x to the second power unless you know what x is.
two hundred minus three times a number is equal to nine
x = 7
By factoring I get x-3 divided by x+3
81 x 2 - 16 = 146
x = plus or minus two thirds
(x+3)(x-3)
x5
Would you mind typing it out for me? I don't quite understand exactly what you are asking. For example, x to the second power minus 4x over x to the second power minus 16 would be... x^2-4x/x^2-16 Do you mind typing it out like that? Because what you wrote makes no sense at all.
26
x9/x2 = x9-2 = x7
x2-x-56 = (x+7)(x-8) when factored