Question

Va rog ajutatima
4a^2-y^2-2a-y=
9x^2+3x-6xy+y^2-y=
5b-4y-16y^2+25b^2=

Answer 1

Răspuns:

Vom descompune in factori expresiile

4a^2 - y^2 - 2a - y =

(4a^2 - y^2) - (2a + y)  =

(2a - y)(2a + y) - (2a + y) =

(2a + y)(2a - y - 1)

9x^2 + 3x - 6xy + y^2 - y =

9x^2 - 6xy + y^2 + 3x - y =

(3x - y)(3x - y) + (3x - y) =

(3x - y)(3x - y - 1)

5b - 4y - 16y^2 + 25b^2 =

5b - 4y + 25b^2 - 16y^2 =

5b - 4y + (5b - 4y)(5b + 4y) =

(5b - 4y) (1 + 5b + 4y)