2007-12-10 10:02:33 · 9 answers · asked by Trisha 2 in Science & Mathematics ➔ Mathematics
8x² - 4x + 15x² + 5x
23x² + x
2007-12-12 05:58:16 · answer #1 · answered by Como 7 · 1⤊ 0⤋
Anytime you see something in brackets, you multiply it out. Do one at a time:
4x(2x-1) + 5x(3x+1) will be
= 8xx - 4x + 5x(3x+1)
= 8x^2 - 4x + 15xx + 5x (^ means exponential)
=8x^2 - 4x + 15x^2 + 5x (now group like terms together)
=8x^2 + 15x^2 - 4x + 5x
= 23x^2 + x (which can also be shrunk down to)
= x(23x + 1)
hope this example is clear enough for you to follow..good luck
2007-12-10 10:14:13 · answer #2 · answered by no_einstein 4 · 0⤊ 0⤋
4x(2x-1)+5x(3x+1)
8x^2-4x + 15x^2+5x
8x^2+15x^2-4x+5x
23x^2+x
The third line is really x^2(8+15)+x(5-4), which gives
x^2(23)+x(1), which gives line 4, 23x^2+x. You do so
many of these things, and then the rule "add like terms"
clicks in, and you just go from line 3 to line 4 without
that in-between stuff.
I hope this clears things up for you.
2007-12-10 10:14:46 · answer #3 · answered by Grampedo 7 · 0⤊ 1⤋
PEMDAS
4x(2x-1)+5x(3x+1)
First do Parenthesis {multiply the inside}
8x-4x+15x+5x
Addtion
4x+20x
24x
2007-12-10 10:09:47 · answer #4 · answered by Anonymous · 0⤊ 1⤋
4x(2x-1) + 5x(3x+1)
=8x^2 - 4x + 15x^2 + 5x
=23x^2 + x
2007-12-10 10:08:21 · answer #5 · answered by Chris 3 · 0⤊ 0⤋
4x(2x-1) + 5x(3x+1) just multiply.. 4x*2x .. 4x*-1 .. etcetc.
(8x^2 - 4x) + (15x^2 + 5x) and combine like terms
23x^2 + x
2007-12-10 10:08:01 · answer #6 · answered by Ardell 2 · 0⤊ 0⤋
4x(2x -1) + 5x(3x+1) = 8x^2 -4x +15x^2 +5x=
23x^2 +x or x(23x +1)
2007-12-10 10:10:40 · answer #7 · answered by justforfun_1811 3 · 0⤊ 0⤋
first you have to distribute.
4x*2x=8x^2
4x*-1= -4x
plus
5x*3x= 15x^2
5x*1=5x
then add the terms...
8x^2-4x+15x^2+5x
23x^2+x
2007-12-10 10:09:00 · answer #8 · answered by Anonymous · 0⤊ 0⤋
umm,,,are you asking us your math homework
2007-12-10 10:11:31 · answer #9 · answered by Anonymous · 0⤊ 0⤋