Question

Factor (4x − 1)2 − (3x − 5)2.

(x − 6)(7x + 4)
12(x − 1)(x + 5)
(x + 4)(7x − 6)
(x − 6)(12x − 1)
this one has selections to it makes it easier because now I can plug in some of the choices.

Answer 1

@zepdrix

Answer 2

Oh hmm, this one is a little trickier.
I guess we have to expand everything out first.\[\large\rm (4x − 1)^2 − (3x − 5)^2\]Remember how to FOIL and stuff?

Answer 3

yeah sure... i remember.

Answer 4

I'll do the second one :)\[\large\rm (4x − 1)^2 − (9x^2-30x+25)\]How bout the other one?
What do we get? :d

Answer 5

uh you lost me how did those numbers arrive?

Answer 6

\[\large\rm (3x-5)^2=(3x-5)(3x-5)\]Do you remember how to FOIL? :o

Answer 7

first outer inner last... bu twhat goes first?

Answer 8

the 4x? or the imaginary number?

Answer 9

imaginary number? whut? 0_o

Answer 10

\[\rm (3x-5)(3x-5)\quad=\quad3x\cdot3x ~+~ -5\cdot3x ~+~ 3x\cdot(-5) ~+~ -5(-5)\]\[\rm (3x-5)(3x-5)\quad=\quad 9x^2 ~+~ -15x ~+~ -15x ~+~ 25\]

Answer 11

ok

Answer 12

is first one by any chance 12x?

Answer 13

\[\rm (4x-1)(4x-1)\quad=\quad 4x(4x) ~+~ 4x(-1) ~+~ -1(4x) ~+~ -1(-1)\]

I'm not sure what you're asking...

Answer 14

mmm ok