How do you factor #3x^2-x-4?

1 Answer
Nghi N.
May 9, 2015

Factor #f(x) = 3x^2 - x - 4.#

Since (a - b + c = 0), then (+1) is a factor and the other is (c/a = -4/3)'

#f(x) = (x + 1)(x - 4/3) = (x + 1)(3x - 4)#

Reminder . Tip in solving quadratic equations.
TIP 1. When (a + b = c = 0), one real root is (1) and the other is (c/a)
TIP 2 . When (a - b + c = 0), one real root is (-1) and the other is (-c/a)

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