因式分解 (4a^2+4a)(4a^2+4a-2)-3 (25m^2-6)^2-625m^2 5abx^2+(a-15b)x-3 (2n^2-n)(2n^2-n-9)+18
问题描述:
因式分解 (4a^2+4a)(4a^2+4a-2)-3 (25m^2-6)^2-625m^2 5abx^2+(a-15b)x-3 (2n^2-n)(2n^2-n-9)+18
急用
答
(4a^2+4a)(4a^2+4a-2)-3=(4a²+4a)²-2(4a²+4a)-3=(4a²+4a+1)(4a²+4a-3)=(2a+1)²(2a+3)(2a-1)(25m^2-6)^2-625m^2 =(25m²-6+25m)(25m²-6-25m)5abx^2+(a-15b)x-3 =5abx²...