How do I factor this? 16x -40x²+9?

Question

How do I factor this? 16x -40x²+9?

Answer 1

Put them in decending order so it would be

-40x^2+16x+9  

then use the quadratic formula:

negative b plus or minus the square root of (b) squared minus 4ac all over 2(a)

-b + or - square root of (b)^2-4ac/2a

Answer 2

I guess:

Trinomial perfect square

a^2-2a*b^2+a^2

the result is

   (4x-3)^2    why?

Answer 3

idk

Answer 4

not factorable over the rational numbers

Answer 5

Why don't u simply use the quadratic formula...

x=  -b + D

     _______________

              2a

and x=  -b - D

     _______________

              2a

in bothe cases, D is under-root of bXb - 4ac

I calculated and got answers as,

x = 0.71 and x = -0.3225

Answer 6

use the formula -b(+/-) under sqaure root[b^2 - 4 (a*c)] the whole term divided by 2a

where a is coefficient of x^2 i.e here -40

b is coefficient of x i.e 16 and c is 9

the answer u'll get are x=  -0.314 and x = 0.714

:)