(
(
(2) 2x24y3xy-2y2+3y+4xy-x2-2x-5
=_y²_ xy + 3y + x²-2x-5
OY²+(x
☆ (
2+(-x+3)+(x-2x-5)
[a]
(3) /ax³ + a²x2x² = aª <3ax³ +4a³
= 3a²³² -2ax²³² + α²x - 2x²
3a³+xa² - 2x³a - 2x²
[y]
(4)²(a²b/4b²³ + dbc-a²c)_[ac ² + bc²_db ² + c³ [a]
3
= (b-c) a² + (b²+be-c²) a (b ²³+ bc²+c²)
6
(1) A=7x
++ B = (2x
12
(2)* A=
A+
(3)
f