[1] x的平方-x-6 [2] 50y的3次-2y
问题描述:
[1] x的平方-x-6 [2] 50y的3次-2y
答
1 用十字相乘法,把6分成2和付三 =(X+2)(X-3)
2 2y(5y+1)(5y-1) 先提公因式2y,再用平方差算
答
X2-X-6=(X+2)*(X-3)
50Y3-2Y=2Y*(5Y+1)(5Y-1)
答
(1)x^2-x-6
=(x-3)*(x=2)
(2)50y^3-2y
=2y*(5y-1)*(5y+1)
答
(1)题为(x-3)*(x+2)
(2)题为2y*(5y-1)*(5y+1)