C= 8πfb solve for f
formula to get (f) : )

Factor completely. x^8 - 1/81 a) (x^4 + 1/9)(x^2 + 1/3)(x^2 - 1/3) b) (x^4 - 1/9)(x^2 + 1/3)(x^2 - 1/3) c) (x^4 + 1/9)(x^2 - 1/3)2

Nine more than four times a number is the same as one less than twice the number. find the number?

What statement is true? 2x^2-9x+2=-1