Question

Ajutor va rog rezolvati numai exercitiul 7 din poza

Answer 1

7a)
x(x-8) +16-$y^{2}$=
x(x-8)+ $4^{2} -4y+4y+ y^{2}$
=x(x-8)+4(4-y)+y(4-y)=x(x+8)+(4-y)(4+y)

7b)
$x^{2} -12x-x- 6^{2}$
=$x^{2} -6x-6x+ 6^{2} - x=x(x-6_-6(x-6)-x=(x-6)(x-6)-x$