factor the following completely?

1 ⤊

factor the following completely?

w^2 -18-3w

2007-12-19 17:35:27 · 4 answers · asked by eric j 2 in Science & Mathematics ➔ Mathematics

4 answers

w ² - 3w - 18 = 0 (Quadratic)

∆ = 9 + 72 = 81 =>√ ∆ = 9

w = (3 ± 9)/2

w ' = 6; w " = - 3

w ² - 3w - 18 = (w - 6)(w + 3)

2007-12-19 17:49:17 · answer #1 · answered by piano 7 · 0⤊ 0⤋

wÂ² - 18 - 3w .......... 1st put in order
wÂ² - 3w - 18 .......... now look for factors of 18 that subtract to make 3, say 6 and 3
(w - 6)(w + 3)
and finally check multiply to make sure your signs are right.

2007-12-19 17:41:18 · answer #2 · answered by Philo 7 · 1⤊ 0⤋

w^2-3w-18
= w^2-6w+3w-18
=w(w-6) 3(w-6)
=(w+3)(w-6)
=> w=-3, 6

2007-12-19 17:43:08 · answer #3 · answered by Anonymous · 0⤊ 0⤋

(w - 6)(w + 3)

2007-12-19 17:40:37 · answer #4 · answered by dark_massiah 3 · 0⤊ 0⤋