已知全集U={4,M²+2M-3,19},几何A={5}若CuA={丨4M-3丨,4},求实数M的值

已知全集U={4,M²+2M-3,19},几何A={5}若CuA={丨4M-3丨,4},求实数M的值
已知全集U={4,M²+2M-3,19},几何A={5}若CuA={丨4M-3丨,4},求实数M的值

已知全集U={4,M²+2M-3,19},几何A={5}若CuA={丨4M-3丨,4},求实数M的值
已知全集U={4,M2+2M-3,19},几何A={5}若CuA={丨4M-3丨,4},求实数M的值
M²+2M-3=5
丨4M-3丨=19
得M=-4
答可别忘了