-X的平方+2X+15
问题描述:
-X的平方+2X+15
答
-x²+2x+15
= -(x²-2x-15)
= -(x-5)(x+3)
-X的平方+2X+15
-x²+2x+15
= -(x²-2x-15)
= -(x-5)(x+3)