If f(x)=2x^2−4x−3 and g(x)=(x−4)(x+4), find f(x)−g(x).

Question

If f(x)=2x^2−4x−3  and g(x)=(x−4)(x+4), find f(x)−g(x).

anonymous · Answer

4x+13

x2−4x+13

3x2−4x+13

−4x2−4x+13

anonymous · Answer

g(x) = x^2 - 16    using identity (a-b)(a+b) = a^2 - b^2

anonymous · Answer

Alright I can help.  So Im gonna give you an example

anonymous · Answer

so
f(x) - g(x) =2x^2−4x−3 - (x^2 - 16) = x^2 - 4x + 13

anonymous · Answer

still so confused

anonymous · Answer

please help, i have to finish my class by 9 pm today

anonymous · Answer

f(x) - g(x) = 2x^2−4x−3 - (x^2 - 16)
               = 2x^2 - 4x - 3 - x^2 + 16
               = 2x^2 - x^2 - 4x - 3 + 16
               = x^2 - 4x + 13

is it clear now??

anonymous · Answer

kinda not really

anonymous · Answer

Is this part clear???

g(x) = x^2 - 16    using identity (a-b)(a+b) = a^2 - b^2