Question

ДАЮ МНОГО БАЛЛОВ!!!
Решите уравнения:
1)x(x-1)(x+5)=(x+3)^2(x-2)
2)(x-4)^2=x(x-3)
3)6-4(x+1)=3x
ПОМОГИТЕ ПОЖАЛУЙСТА!!!!!

Answer 1

X(X - 1 )(X + 5 ) = (X + 3 )^2 *( X - 2 ) 
( X^2 - X )*( X + 5 ) = ( X - 2 )*( X^2 + 6X + 9 ) 
X^3 + 5X^2 - X^2 - 5X = X^3 + 6X^2 + 9X - 2X^2 - 12X - 18 
X^3 + 4X^2 - 5X = X^3 + 4X^2 - 3X - 18 
- 5X = - 3X - 18 
- 2X = - 18 
X = 9 
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( X - 4 )^2 = X*(X - 3 ) 
X^2 - 8X + 16 = X^2 - 3X 
- 8X + 16 = - 3X 
- 5X = - 16 
X = 3,2 
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6 - 4*( X + 1 ) = 3X 
6 - 4X - 4 = 3X 
2 - 4X = 3X 
7X = 2 
X = 2/7