Use FOIL,
[tex](2+x)(2-x)=4-2x+2x-x^2=4-x^2[/tex].
Answer:
4 - x²
Step-by-step explanation:
(2 + x)(2 - x)
Each term in the second factor is multiplied by each term in the first factor
= 2(2 - x) + x(2 - x) ← distribute both parenthesis
= 4 - 2x + 2x - x² ← collect like terms
= 4 - x²
