Complete the factorization. x^2 + 3x - 28 = (x+7)( ?)?

12 ⤊

2006-12-19 13:16:01 · 6 answers · asked by styles4u 4 in Science & Mathematics ➔ Mathematics

(x+7)(x-4)

Check:
x^2-4x+7x-28
x^2+3x-28

2006-12-19 13:17:57 · answer #1 · answered by Anonymous · 4⤊ 0⤋

x^2 + 3x - 28 = (x + 7)(x - 4)

2006-12-19 13:57:08 · answer #2 · answered by Sherman81 6 · 1⤊ 0⤋

(x+7)(x-4) because -28/7 = -4 and 7 +(?) = 3 ? must be -4

2006-12-19 13:24:01 · answer #3 · answered by Renaud 3 · 1⤊ 0⤋

(x + 7)(x - 4)

2006-12-19 13:18:33 · answer #4 · answered by Anonymous · 2⤊ 0⤋

(x+7)(x-4)

2006-12-19 13:22:44 · answer #5 · answered by raj 7 · 1⤊ 0⤋

x | 7 | 7x
x | -4 | -4x
___________
x^2 | -28 | 3x

Therefore,
x^2 + 3x - 28 = (x + 7)(x - 4)

2006-12-19 13:19:21 · answer #6 · answered by dkrudge 2 · 3⤊ 0⤋