计算下列各式 (-1,3)+(2,-2)+(5,8) (4,-7)-(3,5)-(3,-6)

问题描述:

计算下列各式 (-1,3)+(2,-2)+(5,8) (4,-7)-(3,5)-(3,-6)

(-1,3)+(2,-2)+(5,8)
=(-1+2+2,3-2+8)
=(6,9)
(4,-7)-(3,5)-(3,-6)
=(4-3-3,-7-5+6)
=(-2,-6)