X^2+Y^2-12X-12Y-13=0与X^2+Y^2+12X+16Y-25=0的交点坐标?
问题描述:
X^2+Y^2-12X-12Y-13=0与X^2+Y^2+12X+16Y-25=0的交点坐标?
答
用X^2+Y^2-12X-12Y-13=0减X^2+Y^2+12X+16Y-25=0可得6X+7Y-3=0,可知X=-7/6Y+1/2将X^2+Y^2-12X-12Y-13=0中的X都代换成-7/6Y+1/2则可解得:49/36Y²+1/4-7/6Y+Y²+14Y-6-12-13=0解出Y①和Y②,然后将Y①和Y②分...