Question

(2-x)(2+x)(x+4)=? , Please simplify

Answer 1

Step-by-step explanation:

(2-x)(2+x)(x+4) can be solved as follows:

first, multiply (2-x)(2+x)

{using (a+b)(a-b) = a^2-b^2}

it will be 2^2-x^2 = 4-x^2

then, multiply the answer with (x+4):

x(4-x^2)-4(4-x^2)

4x-x^3-16+4x^2

thus, a cubic equation will be formed

-x^3 + 4x^2 + 4x - 16