(1)把100x^2-81y^2分解因式,得(ax+9y)(10x-6y),则a+b的值为( ) A.81 b.9 c.10 D.19 (2)……
问题描述:
(1)把100x^2-81y^2分解因式,得(ax+9y)(10x-6y),则a+b的值为( ) A.81 b.9 c.10 D.19 (2)……
(1)把100x^2-81y^2分解因式,得(ax+9y)(10x-6y),则a+b的值为()
A.81b.9c.10D.19
(2)已知多项式4x^2*(y-z)^2的一个因式为2x-y+z,则另一个因式是( )
A.2x-y-z B.2x-y+z C.2x+y+z D.2x+y-z
速度.在线等~~~
答
(1)a=10,b=9,那么a+b=19,选D
(2)2x+y-z,选D