(x-10)(x+10)
Apply the distributive property.
x(x+10)-10(x+10)
Apply the distributive property.
x⋅x+x⋅10-10(x+10)
Apply the distributive property.
x⋅x+x⋅10-10x-10⋅10
x⋅x+x⋅10-10x-10⋅10
Combine the opposite terms in x⋅x+x⋅10-10x-10⋅10.
Reorder the factors in the terms x⋅10 and -10x.
x⋅x+10x-10x-10⋅10
Subtract 10x from 10x.
x⋅x+0-10⋅10
Add x⋅x and 0.
x⋅x-10⋅10
x⋅x-10⋅10
Simplify each term.
Multiply x by x.
x2-10⋅10
Multiply -10 by 10.
x2-100
x2-100
x2-100
Multiply (x-10)(x+10)