Question

Salu am nevoie de ajutor . Descompuneti in factori diferiti de ptrate : x la a 2-16 ; y la a 2 -49 ; 4ala a 2 -1 ; 25x la a 2 -yla a 2 etc ajutor!!!!

Answer 1

$x^{2}$ - 16 = (x+4)(x-4)
$y^{2}$ -49= (y+7)(y-7)
$4a^{2}$ -1 = (2a-1)(2a+1)
$25x^{2}$-$y^{2}$ = (5x+y)(5x-y)