Which of the following represents the factored form of f(x) = x3 − 81x?

f(x) = x(x − 9)2
f(x) = (x + 9)(x − 9)
f(x) = x(x + 9)(x − 9)
f(x) = x(x2 − 9)

You're original equation has a -81, so the factored form will have to have a positive and negative multiplying one another to achieve that...

f(x) = x(x + 9)(x - 9)

F(x) = x^3 - 81x
f(x) = x(x^2) + x(81)
f(x) = x(x^2 - 81)
f(x) = x(x^2 + 9x - 9x - 81)
f(x) = x(x(x) + x(9) - 9(x) - 9(9))
f(x) = x(x(x + 9) - 9(x + 9))
f(x) = x(x - 9)(x + 9)

The answer is C.

J= r + 9 because since jessica rode 9 more miles than roger, you add 9 miles to rogers mileage.

(6,1)(5,4)slope = (4 - 1) / (5 - 6) = 3/-1 = -3y = mx + bslope(m) = -3use either of ur , = 6 and y = 1now sub and find b, the y int1 = -3(6) + b1 = -18 + b1 + 18 = b19 = bso ur equation is : y = -3x + we need it in standard formy = -3x + 3x to both sides3x + y = 19 < == standard form