Question

descompuneti in factori
1)x²-y²=
2)a²-4=
3)x²-9=
4)25x²-y²=
5)-m²+16n²=
6)36a²-49=
Ajutati-ma va rog mult!!!!!

Answer 1

1)x²-y²=(x+y)(x-y)
2)a²-4=(a+2)(a-2)
3)x²-9=(x+3)(x-3)
4)25x²-y²=(5x+y)(5x-y)
5)-m²+16n²=(4n+m)(4n-m)
6)36a²-49=(6a+7)(6a-7)

Answer 2

La toate se foloseste formula de calcul prescurtat ,, a²-b²=(a-b)(a+b) !!!

(1)       x² - y² = (x-y)(x+y)   ;
(2)       a² - 4  = (a-2)(a+2)  ;
(3)       x² - 9  = (x-3)(x+3)   ;
(4) 25x² - y² = (5x-y)(5x+y)  ;
(5) -m²+16n²= (4n-m)(4n+m);
(6) 36a²- 49 = (6a-7)(6a+7) ;