关于双十字相乘的因式分解
(1) 12x^2+10xy-12x+5y-9
若是后面有会补充的,THANK YOU
(2) 2y^2-ay-3by-a^2+b^2
(3) x^3+(2a+1)^2+(a^2+2a-1)
(4)a^2+b^2-2ab-2a+2b-8