已知A={x丨x2+ax+b=0},B={x丨x2+cx+15=0},A⋃B={3,5} ,A⋂B={3},求a,b,c的值,
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![已知A={x丨x2+ax+b=0},B={x丨x2+cx+15=0},A⋃B={3,5} ,A⋂B={3},求a,b,c的值,](/uploads/image/z/10087162-34-2.jpg?t=%E5%B7%B2%E7%9F%A5A%EF%BC%9D%7Bx%E4%B8%A8x2%2Bax%2Bb%EF%BC%9D0%7D%2CB%EF%BC%9D%7Bx%E4%B8%A8x2%2Bcx%2B15%EF%BC%9D0%7D%2CA%26%238899%3BB%EF%BC%9D%7B3%2C5%7D+%2CA%26%238898%3BB%EF%BC%9D%7B3%7D%2C%E6%B1%82a%2Cb%2Cc%E7%9A%84%E5%80%BC%2C)
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