设全集U={2,4,2M²-3M-3} A={2,M²-M+2}补集A={-1}求M的值?

设全集U={2,4,2M²-3M-3} A={2,M²-M+2}补集A={-1}求M的值?
设全集U={2,4,2M²-3M-3} A={2,M²-M+2}补集A={-1}求M的值?

设全集U={2,4,2M²-3M-3} A={2,M²-M+2}补集A={-1}求M的值?
等于2
根据题意
得
2M²-3M-3=-1
M²-M+2=4
解得M=2