👤

A)(x-y)(x+y)=
b)(2a+b)(20-b)=
c)(y-3)(y+3)=
d)(x+4)(x-4)=
e)(6+a)(6-a)=
f)(1-c)(1+c=
g)(2a-1)(20+1=


Răspuns :

a) (x-y)(x+y)=[tex] x^{2} - y^{2} [/tex]

b)(20+b)(20-b)=400-[tex] b^{2} [/tex]

c)(y-3)(y+3)=
[tex] y^{2} [/tex]-9

d)(x+4)(x-4)=
[tex] x^{2} [/tex]-16

e)(6+a)(6-a)=36-
[tex] a^{2} [/tex]

f)(1-c)(1+c)=1-
[tex] c^{2} [/tex]

g)(2a-1)(2a+1)=
[tex] 4a^{2} [/tex]-1

Sper ca te-am ajutat! :)