Question

8. Calculeaza, folosind formula (a+b) (a-b)=a²-b² a) (x+1) (x-1) b) (x+2)(x-2) c) (x+3)(x-3) d)(x+5)(x-5) URGENT!!!

Answer 1

Răspuns:

a)

$(x - 1)(x + 1) = {x}^{2} - 1$

b)

$(x + 2)(x - 2) = {x}^{2} - 4$

c)

$( x + 3)(x - 3) = {x}^{2} - 9$

d)

$(x + 5)(x - 5) = {x}^{2} - 25$