Question

1. Efectuați:
A. a) (x + 7)(x-7);
d) (3a - b)(3a + b);
3) (12x-1)(72x+1);
1) (y+277)(y-2v2);
b) (2x + 1)(2x - 1); c)(3x + 2)(3x - 2);
e) (2x + 3y)(2x – 3y); f)(x + 5y)(x - 5y);
h) (13x + V5)(13x – 15);
}) (a+V5b)(a – 136).
03 (353x + 1)(352x-4);
$(728-top') ( 13* * ).

plss am nevoie urgent!​

Answer 1

Răspuns:

la 1 este formula (a+b)(a-b)=a pătrat-b pătrat