homework help!!!
2007-05-12 17:08:25 · 17 answers · asked by Russell C 2 in Science & Mathematics ➔ Mathematics
5x (12 + 89x) - 7x(15 + 91x)
= 60x + 445x² - 105x - 637x²
= -192x² - 45x (UNFACTORED FORM)
= -3x(64x + 15) (FACTORED FORM)
2007-05-12 17:12:14 · answer #1 · answered by someone 3 · 1⤊ 0⤋
First, you need to use the Distributive Property of Arithmetic.
So, you distribute the 5x to both 12 and 89x to get:
5x(12 + 89x)
(5x *12) + (5x * 89x)
60x + 445x^2
You do the same thing in the second part:
7x(15 + 91x)
(7x * 15) + (7x * 91x)
105x + 637x^2
Then, subtract them. Don't forget to distribute the minus!
(60x + 445x^2) - (105x + 637x^2)
60x + 445x^2 - 105x - 637x^2
-45x - 192x^2
The End
2007-05-13 00:17:06 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Ps Looked at the answers first before figuring out
Factor and multiply this way-Polynonimal
5x16=60x
5x*89x=445x squared
MINUS
7x*15=105x
7x*91x=637x squared
60x + 445x squared - 105x +637 x squared
60x - 105x= -45x
445 x squared - 637 x squared = 192 x squared
-45x + 192 x squared
192 x squared -45x in order of it's distrbution????
2007-05-20 20:31:55 · answer #3 · answered by astrokick 3 · 0⤊ 0⤋
you are being asked to expand and regroup this is an application of a(b+c)=a*b+a*c
lets break it down, in the first term a=5x, b=12, and c=89x
so lets apply the rule
5x(12+89x)=5x*12+5x*89x=60x+485x^2
now lets apply the rule to the second term
a=-7x, b=15, c=91
so lets apply the rule
-7x(15+91x)=-7x*15-7x*91x=-105x-367x^2
we' e evaluated the first term and the second term so lets put it together by adding both terms
60x+485x^2-105x-367x^2=45x-118X^2
now you maybe asked to simplify in which case you need to revove common factors so you would get x(45-118x)
2007-05-20 17:46:35 · answer #4 · answered by careyschwartz 2 · 0⤊ 0⤋
5x(12+89x) - 7x(15+91x)
= 60x+445x2 - 105x -637x2
=-45x -192x2
x(-45-192x)
x=0
-45 -192x =0
-45 =0 +192x
-45 =192x
x= -45/192
x(0,-45/192) Final Answer
2007-05-19 23:39:34 · answer #5 · answered by thousandthknights 1 · 0⤊ 0⤋
60x+445x^2-105x-637x^2
-192x^2-45x
Greatest Common Factor: -3x
-3x(64x+15)
2007-05-20 19:28:06 · answer #6 · answered by myemeraldjewelz 2 · 0⤊ 0⤋
If you multiply out, you get:
60x+445x^2-105x-637x^2
Combine like terms, and you get:
-192x^2-45x or x(-192x-45)
Depending on whether you're asked to solve for x when the expression is =0, you're either done or the values of x are
x=0 or x=45/192
2007-05-13 00:16:20 · answer #7 · answered by RG 3 · 1⤊ 0⤋
= 60 x + 445 x² - 105 x - 637 x²
= - 45 x - 192 x²
2007-05-13 09:25:15 · answer #8 · answered by Como 7 · 0⤊ 0⤋
60 x + 445 x ^2 - 105 x - 637 x^2
= -45 x - 192 x^2
2007-05-17 15:36:28 · answer #9 · answered by muhamed a 4 · 0⤊ 0⤋
Distribute to get:
60x+445x^2-105x-637x^2
Combine like terms:
-192x^2-45x
Factor out -3x
-3x (64x-15)
2007-05-20 17:36:59 · answer #10 · answered by Ben S 2 · 0⤊ 0⤋