👤
Broosis
a fost răspuns

Cat e (x+15)la a doua
(x-5)la a doua
(x+5)(x-)
(x+5)(x-5)la a doua

Răspuns :

(x+15)²=x²+30x+225 ;
(x-5)²=x²-10x+25 ;
(x+5)(x-5)=x²-25 ;
(x+5)(x-5)²=(x²-25)(x-5)=x³-25x-5x²+125=x³-5x²-25x+125 ;