Question

question 9
multiply and add like terms:
(w + 2)(w - 2)
enter an algebraic expression more..

Explanation:

Step1: Use FOIL method

$(w + 2)(w - 2)=w\times w+w\times(- 2)+2\times w+2\times(-2)$

Step2: Simplify each term

$w\times w = w^{2}$, $w\times(-2)=-2w$, $2\times w = 2w$, $2\times(-2)=-4$

Step3: Combine like - terms

$w^{2}-2w + 2w-4=w^{2}+(-2w + 2w)-4=w^{2}-4$

Answer:

$w^{2}-4$