1. 3(5x + 6y)
2. y( 3x - 5)
3. a^4( 1 + a^5)
4. 2y( y^4 - 2y^2)
5. 5a( b + 2a)
6. (2 - a) ( 5 + 3a)
7. (x + 3) (x - y)
8. (x - 6)(2x + 3 - x - 6) = (x - 6)(x - 3)
1) 8x - x^2 = 0, x(8 - x) = 0
либо x = 0, либо 8 - x = 0
ответы: x =0 , x = 8.
2) (3 - x)(2x - 4) - (2x - 4)(5 + x) = 0
(2x - 4)( 3 - x - 5 - x) = 0
(2x - 4)(-2x - 2) = 0
x = 2 , x = -1
Объяснение:
