2006-07-06 08:41:22 · 10 answers · asked by Anonymous in Education & Reference ➔ Homework Help
By simplify to you mean multiply out:
15x^2 + 20x - 21x -28
then..
15x^2 - x -28
You use FOIL. Multiply all numbers by eachother.
2006-07-06 08:45:40 · answer #1 · answered by FruitCake 3 · 0⤊ 0⤋
FOIL (First, Outside, Inside, Last)
First: 5x * 3x = 15x^2
Outside: 5x * 4 = 20 x
Inside: - 7 * 3x = - 21x
Last: - 7 * 4 = - 28
15x^2 + 20x - 21x - 28
15x^2 - x - 28
2006-07-06 12:49:34 · answer #2 · answered by PuttPutt 6 · 0⤊ 0⤋
it really is all about searching straightforward denominator. a million/2 = 4/8 -- 4/8 + a million/8 = 5/8 5/8 = 10/16 -- 10/16 + 5/16 = 15/16 a million/3 = 3/9 -- a million/9 + 3/9 = 4/9 a million/15 = 4/60 5/12 = 25/60 -- 4/60 + 25/60 = 29/60 i don't believe of that those would nicely be simplified any more beneficial than that. desire this facilitates.
2016-11-06 00:02:01 · answer #3 · answered by Anonymous · 0⤊ 0⤋
FOIL (First, outside, inside, last).
(5x times 3x) + (5x times 4) + (3x times -7) + (4 times -7) = (15x^2) + (20x) + (-21x) + (-28) = 15x^2 - x - 28.
Now apply the principle to doing your own homework.
2006-07-06 08:47:19 · answer #4 · answered by Cols 3 · 0⤊ 0⤋
Firsts
Outers
Inners
Lasts
2006-07-06 08:44:48 · answer #5 · answered by Jill&Justin 5 · 0⤊ 0⤋
(5x-7)(3x+4)
=(5x). (3x) + (5x).(4) -(7).(3x) -(7).(4)
=15x^2 +20x -21x -28
=15x^2 -x -28
2006-07-06 09:10:34 · answer #6 · answered by flori 4 · 0⤊ 0⤋
you multiply it out using either FOIL or the box method. (FOIL is first, outer, inner, last and that's the order you multiply everything together, in case you didn't know)
2006-07-06 08:49:59 · answer #7 · answered by *~.CoRkY.~* 2 · 0⤊ 0⤋
15x^2 - x - 28
I think that's what you should get if you use FOIL.
2006-07-06 08:53:16 · answer #8 · answered by Jules 3 · 0⤊ 0⤋
foil
2006-07-06 08:43:16 · answer #9 · answered by joe b 2 · 0⤊ 0⤋
FOIL
2006-07-06 09:37:55 · answer #10 · answered by Anonymous · 0⤊ 0⤋