1) k(2x-3y)-2x+3y = k (2x - 3y) - (2x - 3y ) = (2x - 3y ) ( k - 1 )
2) a(x-2c)-3x+6c = a ( x - 2c ) - 3 ( x - 2 c) = (x-2c) ( a-3)
3) 5ab-7b+5a^2-7a = 5a ( b + a) - 7 ( b+ a) = (5a-7) (a+b)
4) 20a^2c+9c-15a12ac^2 - какой знак между 15 а и 12 ?
1) k(2x-3y)-2x+3y = k (2x - 3y) - (2x - 3y ) = (2x - 3y ) ( k - 1 )
2) a(x-2c)-3x+6c = a ( x - 2c ) - 3 ( x - 2 c) = (x-2c) ( a-3)
3) 5ab-7b+5a^2-7a = 5a ( b + a) - 7 ( b+ a) = (5a-7) (a+b)
4) 20a^2c+9c-15a12ac^2 - какой знак между 15 а и 12 ?