Answer:
w2−100
Step-by-step explanation:
(w+10)(w−10)
=(w+10)(w+−10)
=(w)(w)+(w)(−10)+(10)(w)+(10)(−10)
=w2−10w+10w−100
=w2−100
w^2-20w -100
(w+10)(w-10)
Foil
first : w*w = w^2
outer: w*-10 = -10w
Inner: 10*w = 10w
last: -10 *10 = -100
Add them together
w^2 -10w-10w -100
Combine like terms
