Question

Calcule (x+11). (X-11)

Answer 1

a)(x+11).(x-11)
x^2-11x+11x-121
x^2-121
b) (5-a^3).(5+a^3)
25+5a^3-5a^3-a^6
25 -a^6

c) (a^2-5).(a^2+5)
a^4+5a^2-5a^2-25
a^4-25

d) (3/4x+y).(3/4x-y)
9/16x^2-3/4xy+3/4xy-y^2
9/16x^2-y^2