Factor xsquared - 4x - 32.
(x - 8)(x + 4)
(x - 12)(x - 12)
(x + 3)(x + 4)
(x + 1)(x - 32)
2007-04-30 16:37:27 · 7 answers · asked by kenane w 1 in Science & Mathematics ➔ Mathematics
you know the solution will be of the form:
(x + _)(x + _)
the two numbers need to multiply to -32, but add to -4.
factor -32:
-8*4 = -32
-8+4 = -4
so the answer is
(x-8)(x+4)
2007-04-30 16:42:46 · answer #1 · answered by horrid 3 · 0⤊ 0⤋
(x-8)(x+4)
2007-04-30 23:39:48 · answer #2 · answered by spmdrumbass 4 · 0⤊ 0⤋
The first one. If your factors are (ax+b)(cx+d),
ac =1, ad+db= -4 and bd= -32. Only that combo works.
2007-04-30 23:41:38 · answer #3 · answered by cattbarf 7 · 0⤊ 0⤋
the answer is (x - 8)(x + 4)..
2007-04-30 23:42:13 · answer #4 · answered by Confused_1 2 · 0⤊ 0⤋
the answer is (x - 8)(x + 4)..
2007-04-30 23:41:13 · answer #5 · answered by Chanale 2 · 0⤊ 0⤋
(x-8)(x+4)
Since you have the different choices, you could just FOIL them out and see which one works.. but I guess just getting the answer on here is easier.
2007-04-30 23:40:07 · answer #6 · answered by onelove92901 3 · 0⤊ 0⤋
1. x^2-4x-32
2. x^2-24x+144
3. x^2+7x+12
4. x^2-31x-32
2007-04-30 23:40:35 · answer #7 · answered by bruinfan 7 · 0⤊ 0⤋