Автор - Ilyakornev05

Помогите пж. Даю 10 баллов.

Ответ

Автор - Golovolomka2222

2)3 times ( {m}^{2}  -  {n}^{2} ) + (m - n)(m + n) =  \  = 3 {m}^{2}  - 3 {n}^{2}  +  {m}^{2}  -  {n}^{2} = 4 {m}^{2}    -  4 {n}^{2}

3)5х^2-5х=0

5х(х-1)=0

х(х-1)=0

х=0

(х-1)=0

х1=0

х2=1

х^2-(х-4)(х+4)=2х

х^2(х^2-16)=

х^2^2+16=

16=

х=8

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