问题
填空题
分解因式:a3-a=______.计算:a4•a3÷a2=______.
答案
(1)a3-a,
=a(a2-1),
=a(a+1)(a-1);
(2)a4•a3÷a2,
=a4+3-2,
=a5.
分解因式:a3-a=______.计算:a4•a3÷a2=______.
(1)a3-a,
=a(a2-1),
=a(a+1)(a-1);
(2)a4•a3÷a2,
=a4+3-2,
=a5.