Page 21 - Алгебра_7_класс_РУС - 2 часть нов
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special.edu.kz.
special.edu.kz.
Упростите выражение (12.13–12.15): special.edu.kz.
12.13. 1) (a 3 a 2 6) ( 4a 3 8a 2 11 );
special.edu.kz. 4 5 – 15b 3 16 ) (17 17b ) (60 – 19x 3 44b 5 4 ); special.edu.kz.
special.edu.kz.
2) (11x
21x
– 7x
);
43
3) (30b
4) ( 73 17x 19x 3 ) ( 18x 3 – 39x 50 ).
12.14. 1) (5a 2 – 4x 25 ) ( 31 9a 2 – 3x );
special.edu.kz.
special.edu.kz. 8b 9,1z 2 3 11 4 ) (10z 3 2 3c 18y ); ); special.edu.kz.
)(70 – 9b
2) (17y
3) (2,3c
5,9
4) (0,8t 2 – 20m 5 ) (41 3m 2,4t 2 ).
12.15. 1) (xy 6a ) (6a z ) (8z 10xy );
special.edu.kz. mn )( ) ( 11b special.edu.kz. 10k ); special.edu.kz.
) (23k
2) 4( b
19cd
20k
3cd
9 )k
8nm
1
3) 21(
5z ;
4) (1,8abc ) (7,7bc d ) (10,1d a ).
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