1.x²-2x-32.m²-3m+2
问题描述:
1.x²-2x-3
2.m²-3m+2
答
1,(x+1)(x-3)
2, (m-1)(m-2)
答
1. x²-2x-3=(x-3)(x+1)
2. m²-3m+2 = (m-1)(m-2)
答
1. x2-2x-3
=(x+1)(x-3)
2. m2-3m+2
=(m-1)(m-2)
两题都是十字相乘