указать номера верных равенств.???

 

 

1)(4-х)(х+ 4)= 16-хв квадрате

 

2) (2х-5)(х-4)= -(5-2х)(4-х)

 

3)(х+1)( 3-2х)=3+х -2хв квадрате 

 

4)(х-4) все квадрате сверху = х квадрате -8х-16 

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