Question

Descompuneti,simplificati si efectuati inmultirile
a.x^2-4/25-y^2•5+y/x-2
b.7x+14x^2/x^2-6x•x^2-36/1+2x
Va rog e urgent multumesc.

Answer 1

a) (x^2-4) / (25-y^2) * (5+y) / (x-2) = [(x-2)(x+2)] / [(5-y)(5+y)] * (5+y) / (x-2) = (x+2) / (5-y)    - s-au simplificat (x-2) si (5+y)
b) (7x+14x^2) / (x^2-6x) * (x^2-36) / (1+2x) = 7x(1+2x) / x(x-6) * [(x-6)(x+6)] / (1+2x) = 7(1+2x) / (x-6) * [(x-6)(x+6)] / (1+2x) = 7(x+6)     - s-a simplificat o data x de la numarator si de la numitor, si apoi  s-au simplificat (1+2x) si (x-6)