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Mathematics 13 Online
OpenStudy (anonymous):

For which value m does the equation x^2-4x+m-1=0 have exactly one solution?

OpenStudy (saifoo.khan):

Use b^2 - 4ac = 0

OpenStudy (anonymous):

how?

OpenStudy (anonymous):

my a=1, b=4 and c = -1? What then?

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