math help?

Question

what's

x (100-2x)(70-2x)

Answer 1

um u cant get the value of x from it coz its not an equation....if u simplify ur question:

x(100-2x)(70-2x)
= 100x-2x^2 (70-2x)
= 4x^3 - 140x^2 + 7000x - 200x^2
= 4x^3 - 340x^2 + 7000x

since its not an equation u cannot get the value of x...i just simplified ur question...if u have the value of x...substitute and find out!! best of luck!!

Answer 2

Simplify:

First, expand the brackets:

=x(100-2x)(70-2x)
=x[(100)x(70)+(100)x(2x)+(-2x)x(70)+(-2x)x(-2x)]
=x[(7000)+(200x)+(-140x)+(4x^2)]
=x[7000+200x-140x+4x^2]
=x[7000+60x+4x^2]

and then multiply out the x!

=7000x+60x^2+4x^3

Hope I can help!


PS. Girl above forgot an x after the 140 so don't use that! (no offence)

Answer 3

x (100-2x)(70-2x)
(100x – 2x*2)(70-2x)
100x(70 -2x) – 2x*2(70 – 2x)
700x – 200 x*2 -140 x*2 + 4 x3
700x - 340 x*2 +4x*3

* means raised to so and so power

Answer 4

you have to foil (100-2x)(70-2x) first.
100 * 70 = 7000
100 * -2x = -200x
-2x * 70 = -140
-2x * -2x = 4x ^2

So, your result is x(7000 -200x -140 + 4x^2)

answer = 7000x - 200x^2 - 140x + 4x^3

final answer = 6860x -200x^2 + 4x^3

Answer 5

x(110-2x)(70-2x)
(100x-2xx )(70-2x)= 7000x-200x-140x2-4x3
6800x-140x2-4x3
4x(1700-35x-x)
You can simplify it after this

Answer 6

x(100-2x)(70-2x)=0
x(7000-200x-140x+4x^2)=0
x(7000-340x+4x^2)=0
x(4x^2-340x+7000)=0
4x(x^2-85x+1750)=0
4x(x^2-50x-35x+1750)=0
4x{x(x-50)-35(x-50)}=0
4x(x-50)(x-35)=0
so, (x-50)(x-35)=0/4x
(x-50)(x-35)=0
x-50=0 or x-35=0
so, x=50 or x=35

Answer 7

x(100-2x)(70-2x)=0
x(7000-140x-200x+4x^2)=0
x(4x^2-340x+7000)=0
4x(x^2-85x+1750)=0
4x(x^2-50x)-35(x-50)=0
4x{x(x-50)-35(x-50)=0
4x(x-50)(x-35)=0
4x(x-50)(x-35)=0/4x
(x-50)(x-35)=0
x=50 x=35