Question

Помогите решить примеры?

Answer 1

(х+3)2+=х2+9+6х
(х+2)2=х2+4+4х
(х-1)2=х2+1-2х
(х-2)2+24=х2+4-4х+24
(х-3)(х+3)=х×х+х×3-3×3-3×х=х2+3х-9-3х=х2-9

Answer 2

1) $x^{2} +6x+9-2x-6=0 \ x^{2} +4x+3=0 \ (x+1)(x+3)=0$
x+1=0 x=-1
x+3=0 x=-3
2) $x^{2} +4x+4-43+6x=0 \ x^{2} +10x-39=0$
(x-3)(x+13)=0
x-3=0 x=3
x+13=0 x=-13
4) $x^{2} -4x+4+24=4+12x+9 x^{2} \ -8 x^{2} -16x+24=0 \ x^{2} +2x-3=0$
(x+3)(x-1)=0
x+3=0 x=-3
x-1=0 x=1

Answer 3

5) x^2-9-5x+13=0 x^2-5x+4=0 (x-4)(x-1)=0 x-4=0 x=4 и x-1=0 x=1

Answer 4

в 3 может ошибка?