1. (2x-1)^2
2. Which of the following is a factor of 4-(x+y)^2?
2007-07-19 15:56:01 · 4 answers · asked by Rox 1 in Science & Mathematics ➔ Mathematics
You don't need college algebra for this!
1. Don't forget FOIL: Firsts, Outsides, Insides, Lasts.
(2x-1)(2x-1)
F: (2x)(2x) = 4x^2
O: (2x)(-1) = -2x
I: (-1)(2x) = -2x
L: (-1)(-1) = 1
Now we add these, and their total is 4x^2 - 4x + 1.
2. No choices.
2007-07-19 16:07:29 · answer #1 · answered by no such user 4 · 0⤊ 0⤋
1. Remember the FOIL
First: 2x *2x
Outer 2x * -1
Inner -1* 2x
Last -1 * -1
Do the multiplications, add and simplify.
2. No choices, no answers.
2007-07-19 23:01:11 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋
1.(2x-1)^2=(4x^2)-4x+1
u can apply the (a-b)^2 = a^2 - (b*a*2) + b^2
2007-07-23 22:17:03 · answer #3 · answered by NADO 2 · 0⤊ 0⤋
(2x-1)(2x-1)
FOIL
4x^2-2x-2x+1
4x^2-4x+1
2. 4-(x+y)(x+y)
4-(x^2+2xy+y^2)
2007-07-19 23:01:57 · answer #4 · answered by leo 6 · 0⤊ 0⤋