十字相乘因式分解3a²-a-46y²-11xy-10x²
问题描述:
十字相乘因式分解
3a²-a-4
6y²-11xy-10x²
答
(3a-4)*(a+1)
(3y+2x)*(2y-5x)
答
3a²-a-4
=(a+1)(3a-4)
6y²-11xy-10x²
=(2y-5x)(3y+2x)
答
答:
1.原式=(3a-4)(a+1)
2.原式=(2y-5x)(3y+2x)