Răspuns :
Răspuns:
Explicație pas cu pas:
Desfacem parantezele
x^2-6x+9-8x-4=x^2-16-7x
Reducem termenii asemenea
-14x+5=-16-7x
21=7x
x=3
Salut,
(x-3)^2-4(2x+1)=(x-4)(x+4)-7x=
=x^2-6x+9-8x-4=
=x^2-16-7x=
=-14x+5=
=-16-7x=
=21=7x
x=21:7
x=3
[tex]by \\ 7646[/tex]
(x-3)^2-4(2x+1)=(x-4)(x+4)-7x=
=x^2-6x+9-8x-4=
=x^2-16-7x=
=-14x+5=
=-16-7x=
=21=7x
x=21:7
x=3
[tex]by \\ 7646[/tex]