Question

a)(xy+4).(xy-4)
b)(7-am).(7+am)
c)(x+0,5).(x-0,5)
d)(0,3-a).(0,3+a)​

Answer 1

Resposta:

a)(xy)^2 -4^2=x^2 y^2 -16

b)7am×(7am)

49am+7a^2m^2

c)x^2-0,5^2

x^2-(1/2)^2=x^2-1/4

d)0,3^2 -a^2

(3/10)^2 -a^2=9/100 -a^2

espero ter ajudado!!